I've seen pre-med students who hate anatomy, have no interest in microbiology, etc. These subjects at least seem to have a lot of relevance to their field!
I tend to have blinders on sometimes as far as my major goes-- I hate my general requirements, suck at math, I'm bleh about chemistry, but bio I just adore. So perhaps that reveals a flaw in my own character. But hey, I would have taken art classes for fun but they are expensive, take up time, and I'd have to start at the beginning with 3 hour long beginners classes! I've resigned myself to letting art be a hobby.
My favorite bio-related subjects are ecology and evolution, which we touched on in my general bio 2 class. I adore learning about the variety of life, the similarities and the development over life's history. However, since that class I've found I enjoyed microbiology and I'm currently enjoying cell physiology!
Here are some neat critters I enjoyed learning about back in the days of gen bio. :)