Can you think of any "tests" to determine whether someone has a natural "knack" for (a) sales, (b) marketing, (c) business, (d) law, (e) teaching and/or (f) ______?

I realize I am phrasing this quite ambiguously, but a “test” is akin to when someone at a party offers an offhand caveat about an entire profession/career choice (and usually based on first or second-hand information), suggesting something along the lines of “teaching is great, but you really have to have a knack for instantly commanding respect,” or “being a lawyer is fine, but you really have to love spending weeks and weeks on incredibly mundane legal topics and have an incredibly capacity for retention and recall for everything you read” or “don’t go into business if you hate having to be ‘on’ and all the time, aren’t good at math, and don’t always have your sh*t together,” etc., etc. These are all careers I am considering (yay for a liberal arts degree), but I’m interested in Flutherites’ opinions about what makes certain people truly excel or fail in these particular careers.

I hear time and time again that you should do something that you can do better than everyone else, so I am interested in the more nuanced skill sets, characteristics, tolerances, and affinities that transcend the conventional, surface-level thinking about these careers that permeates even the most analytical and introspective job seekers’ minds.

I would also be interested in any other ‘tests’ you can think of for any other career as well; this is simply a starting point.