Ey, next to teaching it is the favorite part of my profession!

(I like modeling systems and greenfield development as well, but I feel my time is absolutely best utilized when I can train others or crack hard bugs that are worth paying someone good money to crack.)

I like it too, sometimes. A good bug can be like a whodunnit, with multiple suspects, all doing something nefarious, scheming their little schemes and thinking they're the only ones. Now find the miscreants causing the death of the process.

Some codebases have every participant screaming they stabbed the goddamn basterd, and the job is more a whodidn't.

I love it too! As another commenter says, it's like a murder mistery, specially when it is not your code. The only frustrating bit (at least for me) is being just told "there's a crash around here", but once you have a way to reliably reproduce it I enjoy it quite a bit.

I assure you there's at least two of us :-)