I love Halloween. It was the only holiday we could get out and have fun... and costumes/pretending was encouraged. It's still the only holiday I truly enjoy, though I stay away from the gruesome stuff. The monsters parading around were never as bad as the monsters at home...
All the other holidays were filed with "family time" (read "unending fighting")... and since I stopped eating meat, turkey day is just a torturous day filed with gross food I don't eat. The highlight is generally the desert, but lately even that's been pretty awful.
Christmas and new year traditionally held the worst fighting, and new years serves to remind me I've gone yet another year failing at life...
I've found the holidays bring out the worst in me. I get cranky, angry, and mean. I try to be conscious of it, but it's such a trigger, and it's inescapable. I'm constantly checking myself around my dislike, especially since the wife LOVES the holidays and all the family time. I try my best to work on those days if I can.