I've seen pretty much every combo often enough to not be impressed by it anymore, or do a double take. Looking at my Fem Pandaren Warrior is pleasing and new enough to make me consiously watch though.
worgen warlock/rouge/death knight.
dwarf warrior (thank you J.R Tolken).
NElf female has to be the most underrated race/gender in the game. They look ugly until you get them in higher-level gear, though.
Same goes for Draenei Males. They look horrible until they have some real shoulderpads on.
If you truly believe that, Blizzard, show me you mean it. Because WoD didn't show me.As long as players are happy and enjoy the game, the team doesn't mind extreme peaks and valleys. They just want to ensure you have a great experience and feel like you got your money's worth.