Fixing bugs can be very enjoyable. I like watching House MD for the same reasons. I feel like House's quest for a diagnosis given a subset of the symptoms and his way of trying to provoke new symptoms to appear in order to narrow the set of possible diagnosis, is just like trying to find the cause of a bug. I don't know if other programmers watch House with this analogy in mind, but I wouldn't be surprise if it's the case, the analogy is really strong.
Investigating bugs seems to me like the only part of computing that could actually be considered a true science. You come up with theories about why a system is going wrong, and then setup experiments based on those theories.
