I play horde, not because I care a damn about lore, but let's face it, orcs and trolls are the sexiest races in azeroth of course the blood elves are the odd one in, but then they did not exist back then. It's good to see we get our own version of midgets too and they are green to boot!
Undead are just "meh" though, never really enjoyed playing them I want my armour in one piece, and it makes no sense to have an Undead with half broken armour when there are legions of undead out there with quite functional and working armour.
Most of my characters are trolls/orc unless for RP "/lol" purposes, the exception being my paladin as that can only be a Belf.
Naturally I do have alliance characters, they are exclusively dreanai though, humans walk like they have a stick up their back side, Nelfs just *shudders* no I can't describe my hate for them it just is Dwarfs aren't too bad though, but being able to kill a raid boss because your breath smells of last weeks keg o beer is not appealing to me. Oh I forgot the gnomes, they are entirely their for comedy purposes, It's like watching a bad version of willow! or a miniature barbie doll (yes I'm looking at all you pink haired mini britney's)
so yea that's why I choose horde
Your pain was my pleasure, your sorrow my joy!