NERRRRRRRRRRRRRRRRDDDDDDDDDDDSSSSSSSSSSSSSSSS
Just kidding. Unless you want to kill your own faction, i suggest rolling horde. Alliance is full of whiney little kids, actually the reason i quit the game the first time around. The good thing about wrath right now is that they lowered the amount of xp it takes to get from 1-60 and it seems like even 61-68 took less time this time around. Also, most of the zone in azeroth (original game) are empty, so you dont have to fight over quest mobs, and there isnt much ganking.
Also, i'm not saying horde doesnt have its share of whiney little kids, but alliance, having 2-3 times as many players per server, there are more crybabies to deal with.