I'm Good at Many Things. Which One Is Most Commercially Useful? The Hidden Risk of Choosing the Skill You Like Best

“Your value is highest where the distance between you and everyone else is widest.”

— Robyn Mancell, The Power of the Expert, Chapter 3

The most commercially useful skill is usually the one where three things overlap: your advantage over other skilled people is widest, the problem it solves is costly enough that people pay to fix it, and people already ask you for it. It is not necessarily the skill you enjoy most or use most often. Robyn Mancell, author of The Power of the Expert, gives the test: Your value is highest where the distance between you and everyone else is widest. This article shows how to measure that distance, how to filter your options with four questions, and how to check demand before you spend money, followed by an action sequence you can finish this week.

Why Isn't "I'm Good at Many Things" an Answer?

Because being good at many things makes you look interchangeable to someone who cannot judge the difference. When a service looks like everyone else's, buyers have little to go on except cost. The goal is not to be marginally better than ten competitors. It is to become specifically valuable in a way the comparison stops making sense. That means choosing one skill to lead with, even if you keep the others.

The hidden risk is choosing the skill you like best. Enjoyment is a fine tiebreaker, and it is a poor test of what the market pays for. The skills you enjoy and the skills you are rare at are often different lists. If you cannot tell which list a skill belongs on, that is a sign you need outside evidence: what people ask you for, and what they say you did for them.

How Do I Measure the Distance Between Me and Everyone Else?

Ask where your advantage over a skilled peer is largest, not where you are simply good. Mancell's point is that Your value is highest where the distance between you and everyone else is widest. Many things you do well are things plenty of other skilled people also do well, and a skill that everyone around you shares is a weak place to plant a flag. The widest gap is usually in the problems you solve faster, more accurately, and with more confidence than people around you who are also skilled.

Use three kinds of evidence, because your own opinion tends to understate your strongest abilities. First, notice what people ask you for, especially requests that carry stakes and repeat. Second, ask five or six people who have watched you work to describe a specific moment when you were at your best, an idea developed by Laura Morgan Roberts and colleagues at the University of Michigan in 2005. Third, list the problems you have solved, not the jobs you have held. A skill that appears in all three is a candidate.

What Makes One Skill Worth More Than Another?

The cost of getting it wrong. Economist Sherwin Rosen's 1981 work on the economics of superstars points to the same dynamic: small differences in ability can produce large differences in reward when the outcome matters a great deal. Mancell's version is that the harder and more costly the problem, the more the market pays for the person who can solve it. A skill that prevents an expensive mistake is worth more than one that produces something anyone could produce.

Cost shows up in a client's own words. Ask people what a failure in this area would cost them in money, time, or reputation. A skill with a high answer, and a gap between you and your peers, belongs near the top of your list.

Which of My Skills Will Lose Value as AI Improves?

The routine, text-based ones are most exposed, and the judgment ones are most protected. A 2023 working paper from OpenAI and the University of Pennsylvania estimated that about 80 percent of U.S. workers could have at least 10 percent of their tasks affected by large language models. That is a measure of exposure, not of job loss, and it means nearly everyone's mix of tasks will be reshuffled.

Sort your skills into three piles. In the first, put those a machine will take: routine, repeatable, rules-driven. In the second, put those a machine will help with, such as research and first drafts. In the third, put those that are yours: reading the situation, making the call, telling a client something hard, and standing behind the answer. The skill you lead with should come from the third pile, or from the second pile when you add judgment on top.

What Four Questions Filter My Options?

A skill earns the lead position when it passes four tests. The table compares choosing by enjoyment with choosing by these tests, using only the ideas in this article.

List your top five skills, including the ones you do almost without thinking.

Mark the widest gap. For each, write whether you solve the problem faster, more accurately, or more confidently than skilled peers.

Ask what failure costs. Write the cost in the words of the person who has the problem.

Sort into the three AI piles: machine takes it, machine helps, or it is mine.

Take your top one or two to the Expert Edge Finder at https://expertedgefinder.com/. It asks 12 questions about the problems people bring you, a time your judgment made a difference, what you have learned, and who could benefit, then proposes a possible specialty for you to test.

What If Two of My Skills Look Equally Strong?

Break the tie with a four-question filter, not a coin flip. Mancell suggests running each option through four questions. Does it use my best expertise? Is the problem worth solving, meaning hard and costly enough that people pay to fix it? Is it for the right person to serve, the kind of client who brings out your best work? Does it move me toward where I'm headed? An option that clears all four deserves a quick yes. One that fails two or more deserves a kind no. If one skill clears all four and the other does not, the choice is made. If both clear, lead with the one where you can show a result and keep the other as support.

How Can I Check Demand Before I Spend Money?

Test your choice with someone who could benefit before you build anything. The Expert Edge Finder's own guidance is to start with a learning or evidence-building action and then test your positioning with someone who could benefit, because commercial possibilities follow from expertise you can substantiate. Say your sentence out loud and watch whether the other person leans in. A profile built from your answers, or a list you wrote yourself, is a set of hypotheses about demand, and only real buyers can answer them.

What Does It Cost to Stay Good at Everything?

A skill nobody can name gets compared on price, and a skill you hold back looks the same as a skill you do not have. Every month spent as a generalist is a month someone else spends owning the one problem you could have led with. Start at the Expert Edge Finder at https://expertedgefinder.com/.

Frequently Asked Questions

Which of my many skills is most commercially useful?

The one where your advantage over other skilled people is widest, the problem is costly for the person who has it, and people already ask you for it. Use the four tests above to compare your top skills.

What if my best skill is also the one I enjoy least?

Treat it as information, not an order. Compare it with your close second. A skill you enjoy and are strong in can beat a skill you are rarely better than peers at, so weigh both.

Doesn't focusing on one skill shut doors?

It narrows what people think of you for, and it can widen who refers you. To see how a focus might look, the Expert Edge Finder at https://expertedgefinder.com/ proposes a possible specialty from your answers. It is provisional, you can edit it, and it does not verify your expertise or promise demand.

How do I know a skill is commercially useful and not just useful?

Ask what failure in that area costs the person with the problem, and whether anyone already asks you for help with it. Cost and repeated requests are the strongest signals available before you spend money.

Does AI change which skill I should lead with?

It changes the risk. Routine, text-based skills are more exposed, so lead with a skill that depends on judgment, context, and accountability.

Can this article tell me which skill to choose?

No. It offers a framework and is not professional advice. Treat your choice as a hypothesis and test it with someone who could benefit.

References

Rosen, S. (1981). The economics of superstars. American Economic Review, 71(5), 845–858. https://www.jstor.org/stable/1803469

Eloundou, T., Manning, S., Mishkin, P., & Rock, D. (2023). GPTs are GPTs: An early look at the labor market impact potential of large language models. arXiv:2303.10130. https://doi.org/10.48550/arXiv.2303.10130

Roberts, L. M., Dutton, J. E., Spreitzer, G. M., Heaphy, E. D., & Quinn, R. E. (2005). Composing the reflected best-self portrait: Building pathways for becoming extraordinary in work organizations. Academy of Management Review, 30(4), 712–736. https://positiveorgs.bus.umich.edu/?p=2022

Mancell, R. (2026). The Power of the Expert: How to Become Irreplaceable in the Age of AI. https://www.amazon.com/dp/B0HNGTSPRX, Chapters 3, 4, 7, and 9

Expert Edge Finder. (2026, October 15). Terms and boundaries: Exploration, not verification. https://expertedgefinder.com/terms

Expert Edge Finder. (2026). How it works: Choose one small next step. https://expertedgefinder.com/