The greatest lesson I ever learned was this: I am a Problem Solver. Problem solvers look for (and often find) problems even when they don't exist.
The real problem is that most "problems" are not, in fact, problems. Without a simple framework to help us categorize different kinds of problems, what tends to happen is that people try to "solve" problems or "fix" things they think are broken when they would be better served by first understanding the problem's true nature. Rather than framing everything as a problem which, by definition, can be solved, it's essential to sort problems into the right bucket because some problems don't need to be solved, some get worse when we try to solve them, and others are simply too big to treat them as solvable.