If you care about RP, you might want to consider rolling Horde. There’s interesting concepts (events, characters, guilds) flying around Hordeside, if you don’t mind going out of your way looking for them.
There’s Orcish Poetry appreciation night events, pure unadulterated intrigue and IC drama between guilds (with OOC and IC being separate), amazingly immersive every-man characters and many other features that I feel have gone missing from retail-style RP.
I have no clue at all what alliance RP on this server looks like, at all.
Sure, you’re going to have to put up with some super-toxic griefer Alliance guilds playing as Horde. However, you are probably going to be better off playing against those guilds on occasion, than having to put up sharing the same space with them constantly.