worg 1% crit and extra sprint for pvp
nelf vanish=double ambush xD
panda=double food buff so look at that and extra gouge without a facing requirement is handy in pvp
human is meh you can get away with double trinket on other races esp if you do PvE most bosses dont stun so forget the insignia
really gnome/dwarf are more pvp oriented to remove debuffs and close the gap or something they are both useless in pve. Id look at worg
all alli racials are defensive for no reason
horde=orc for flatout damage on yellows or troll for autoattacks
belf is like thistle tea it will give 1 extra sinister+aoe silence OPAF in pvp
UD is kind of meh to be honest at least for me not many people have fear. But they look cool