Bounties attract serious brainpower to the challenge.
A system to let people identify their obsessive behavioral patterns and harness them to make a living.
Turn a "bad" thing into something productive.
This might be the best approach to finding an occupation in which you'd be the most efficient/successful (I'll argue why below).
How it works:
The logic behind the idea is that obsessive behavior is the least effort requiring behavior. You could say it requires "negative" effort since you simply can't stop doing it, there's a psychological force making you do it apart from your own effort.
With activities based on likes/inclinations, it's a bit different - you still have to invest effort, while with obsessions you can't go without it. So performance-wise the latter is the most efficient case. In other words - in order to be good at something it's not enough to simply like that activity, you have to be obsessed with it.
One could say there's an effort spectrum from activities you don't like doing to activities you're obsessed with:
Obsessions are similar to addictions, nevertheless, there's a difference. Obsession could be viewed as an addition to your own effort. While addictive things and activities give a person pleasure, which one then goes repeatedly craving for, obsessive behavior usually involves repeating actions that are not in themselves pleasant to most people, on the contrary - they require effort to be performed.
This is not only for the mentally ill or the weirdest of us, I believe this approach for finding the right occupation might be useful for many people.
You might not have a solid and apparent obsession like overly cleaning or bringing excessive amounts of second-hand stuff home from the streets, but every psychological trait has a spectrum and you are likely to have subtle obsessions in different life areas you are not even aware of.
A psychological test could be developed to find those subtle (or clear) traits and then according to their nature suggest suitable occupation options. This identification process could be aided or led by a psychologist, an AI-powered app, etc.
There could even be a government-funded program for young people to try different occupation options suggested by the proposed system and see how they are doing at those activities and how good they feel. This would be the practical testing part of the system. The person would then decide afterwards if they want to stay in one of those occupational fields or not.
Bringing stuff at home from the streets - sell second-hand stuff online, open an antique store, etc.
Obsessed with cleaning/tidying - work as a cleaner, hotel staff, hospital technician, etc.
Obsessed with thinking (overthinking) - turn it into ideation.
Melomania - start selling records, become a Dj, etc.
Can't stop partying - start working in a club/bar.
Those are very crude examples of how obsessive behavior can be turned into an occupation, but as I mentioned above, the idea is not so much about crude cases, but rather a development of a generalized system many people could benefit from.