For the longest time, my wife envied the Alliance for the Sprite Darter Hatchling, but that's going to get straightened out soon enough. We also used to whine how the Alliance got the Winterspring Frostsabers, while the Horde never quite got the Venomhide Ravasaurs (we still might, though!). A lot of little things make us think that Blizzard favors one faction over the other.
This seems to be true of other classes, as well. No matter what happens, for some reason, there's always something that other classes have that the class you play doesn't. I know I'll always whine about a Death Knight's 1 second GCD in PvP. Among other things, I mean. I know how some players cry foul at the bubble. There's always something. Of course, it's really silly to think that there's any sort of favoritism going on (for the record, I don't think there's any), but we'll always find that the grass is greener on the other side. So, in what aspects of the game do you think the other faction or classes have it easier?