If you haven't seen it, then I urge you to. It's up there with Columbo as one of the more intelligent TV cop/detective shows.
Adrian Monk is different because he has multiple phobias, obsessive-compulsive disorders and autistic symptoms which plague his life, but which make him uniquely able to solve cases that have the regular police stumped.
For example, when I'm hanging out the washing I always have to use matching pegs. It doesn't feel right unless each item of clothing has pegs of the same colour. Or if they're wooden pegs, they have to be pairs of old ones, or new ones.
It's odd. But not a problem.
I'm pretty sure that it's the only 'compulsive' quirk that I have. Do you have any?