Now I have two books that teaches me how to write exploits and tools.( I am not a script kiddie or a white hat) I just study because it is quite interesting. But I would say that it is more of curiosity than an interest.
What am I really interested would be social science because it was the only subject that I continued to ponder and think about for years. Normally I would not ponder about a subject more than months, so I am quite convinced that I like this subject.