Orc - good racial, also the most fierce looking race on the horde side.
Taurens - extra stam, a stun, huge fucking bad ass beef.
Troll - dey' be trollin' mon
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Gnome - amusing, hilariously looking, obviously make the small tanks look big.
Worgen - Sniff your way into battle plus you got a roar!
Dwarf - Great racial, actually one of the best imo. Removes bleed/poison effects also gives 10% extra armor!
Draenei - unleash the kraken? tentacle face!
Human - free trinket
------------> if any alliance types I would probably take DWARF