Favorite: Shoulders and back. Military press, rows, raises, mmmmmm im gettin all hot and bothered just thinking about it.
Dreaded: Legs. This used to be my favorite muscle group to work out...until I started falling apart. After my patella got dislocated a few times and several torn ligaments and tendons I just dont really work out my legs much anymore. I dont know what it is but I just have bad legs. I have to run on trails, no hard surfaces for me.