Monk is cleanliness freak and he wipes his hands with a tissue every time he shakes hands with someone.
Monk is crazy about keeping things organized, just like Monika in Friends and may be more.
Monk is proud to be an American; he touches poles on the street because they are a part of it.
Monk keeps track of time i.e., he can say how long has been this meeting going on without watching the clock.
Monk is good at memory and he can detect you are lying if it involves popular facts/news.
Monk observes every minute detail, which makes him a great crime-scene investigator.
Monk is good at putting facts together and he smiles a peculiar laugh when he got the last part of the puzzle which solves the case under investigation.
Monk has enemies from the cases he successfully solved.
Monk is scared of heights.
Monk says “You’ll thank me later”, but no one does.Monk has great powers for which he says, “It’s both a gift and a curse!!!”