Blood Elf:
Magic Resistance. The nature resist will stack with Aspect of the Wild.
Arcane Torrent. If casters get too close, this can help even the odds.
Orc:
Increased pet damage. Self-explanatory
Blood Fury. Increases your attack power for both ranged and melee.
Tauren:
Endurance. 5% extra health is great for any class.
War Stomp. Great in many situations, this can help get you back to range.
Troll:
Throwing Specialization. This now includes +5 to bows.
Berserking. This can be activated at will, providing a 10-30% haste effect depending on your health.
Draenei:
Heroic Presence. Buffs your party members' chance to hit, including your pet.
Gift of the Naaru. A useful heal-over-time that can work together with Mend Pet or keep you alive if you get caught in melee.
Dwarf:
Gun Specialization. Self-explanatory.
Stoneform. Can give you a distinct advantage in hunter vs. hunter.
Night Elf:
Shadow Meld. Can be use in conjunction with the cat ability Prowl (and/or Aimed Shot) for ambushing.
Quickness. Increased 1% dodge chance if mobs get in melee range.