3min insignia
versus
shadowmeld/quickness/(nature resistance)
versus
stoneform/(frost resistance)
versus
escape artist/(arcane(restistance).
gnomes, humans and dwarf also comes with some +expertise on sword, mace or daggers (depends on class).
having a nightelf rogue on my own, though i despite pvping as alliance (WHO THE HELL WANTS TO KILL HORDE?
), shadowmeld and quickness are really nice racial abilities.
stone form is also very, very nice indeed (my pvp priest is currently dwarf) since it allows me to remove nasty poison and bleed effects, which i can't remove with spells and gives me a neat armor buff.
my bankalt (currently level 70 because i'm out of char slots :| ) is a gnome mage and escape artist is sometimes really useful, especially with blink on cd.
last but not least, humans. well.. my lock and dk are humans and sometimes i forget about my 3min insignia :/