Now with the Horde you have a bit more of choice. Statistically Orc's and Tauren start out with a little bit more hitpoints then a Troll does. However the Troll has more of a dodge bonus then his counterparts. See my previous comments for the Alliance for a reminder of the pro's and con's of this aspect.

Now on the upside Troll's have a higher regeneration rate then his counterparts which helps with having slightly less hitpoints. But on the downside Troll's have a bonus (+5) to thrown weaponry. Which is, for lack of a better word, absolutely useless to a Hunter. If you're using thrown weaponry as oppossed to your rifle/bow/crossbow then you're doing something wrong with your Hunter. However, Trolls get two other abilities which are very nice. A +5% damage bonus against beasts (which you will be fighting primarily) and an instant cast rage which you can use when your backed into a corner. Both are very handy to have.

Tauren seem to be the popular choice for Hunters on the Horde side. Why? I'm not to sure but that's what I see running around all the time. Tauren, like Night Elves, recieve a +10 resist bonus to Nature spells as well as a really nice racial trait: War Stomp. Basically it stuns up to five creatures within your area. Nice to have if your pet drops aggro. They also get a +15 bonus to Herbalism but that's not really pertinent to Hunters. If you want to be an apothacary, that's fine, but we're not discussing that in this guide.

Finally you have Orc's which, is my primary choice for Horde Hunters. Orcs, other then having the second highest HP rating, recieve a +5 racial bonus to Axes, his pet's melee damage is increased by +5% which is really nice, a +25% resistance to knockout and stuns which is really REALLY nice and an instant cast fury which ups his strength by 25%.

Overview:

Now like I said before each race has it's pro's and con's but ultimately there is no single "best" race of which to choose from. Each has it's perks and it's ultimately up to you to decide how you want to play your hunter. No one race is better then the others and it's not really possible to "gimp" yourself in this regard. So choose carefully and enjoy your choice.