I used to love training everything - probably chest the least because it was hard to "feel" it. These days however, I like the bodypart that hurts the least. I've had to back off a lot on bicep training because of tendonitis, though I'm lucky to have decent peaks genetically. The rest - if my knees don't hurt, I have amazing workouts and it feels like the planets are aligned and everything in the world is perfect. Back, chest & of course shoulders, all are affected when my right shoulder tweaks. I had surgery on it 3 yrs ago and it started getting annoyed about a year ago, and just hasn't gotten back to normal.
After taking nearly a year off (sporadic training), I'm really hoping to get back into things for prep. I was recently made aware of mountaindog1's youtube channel and there's some variations on stuff to do w/ various pieces of eqpt. Really gets me jazzed! I so wish I had a better gym and was aware of this stuff 20 yrs ago!