I'm pretty sure everyone has that 1 class (or more) which he/she almost never considered playing or maybe even never played at all for various reasons.
For me it's Warlock and Shaman. I've never leved any of those 2 further than lvl 20'ish. I just don't like the dark/demonic theme of Warlocks. As for Shamans, it's weird, there's something I really don't like about the class but I can't put my finger on it (I think it might have something to do with totems).
How about you? Is there a class that you've never really enjoyed or maybe even outright refuse to play?