The best people to speak about Horde-side RP are the Horde players themselves! I’m with Rekfar on this one. I’m sure no one would like it if I rocked up and pretended to know all about Alliance RP when I don’t even play there anymore.
That’s right, it’s entirely possible to fulfil all your RP needs from Horde side!
It just takes a bit more effort. You have to be willing to go up to people and talk to them, and there might not be 50 people to choose from, more like 5-10. if you can handle that, and your character concept is not so socially inept that you can’t talk to strangers…then you’re golden!
The Alliance to Horde Re-roll Support Group is something I started a few months back, and it’s been going well so far. I think WoW is in a bit of a lull mid-expansion, and people are looking for something new to try. There’s never been a better time!
There’s also this thread I created to help newcomers to the Horde find a guild!
Good luck, and we look forward to meeting your new character!