I really love Godel and logic, but it seems to me that most books are heavy on theory and light on problems. It also seems to me that this isn't just a fluke -- there really is something about logic that makes it tougher to approach via problems, rather than reading theory.
What I'm wondering is: is it true? Do some areas of math really have worse problems? Why would that be, and what areas of math are most afflicted with this plight?