I've only played on 3 servers, Virtue, Freedom, and Triumph. My impression of Triumph is that other players are generally helpful when they are around but it can be difficult to find teams. I didn't play on Triumph long enough to get "on the inside." It probably wouldn't be too hard if you subscribe to the chat handles. If you can get in with the core players, I'm sure it's a great place to game.
I was highly disappointed with the community on Freedom. Generally my experience has been that players will join teams and bail at pretty much any moment, and broadcast trolling dramas are pretty much a constant. Granted, I left Freedom back in December, and I'm not a PVPer so I don't know if the influx of PVP players has changed the environment, but my impression is that if you play WoW and you enjoy that sort of environment then Freedom is the place for you. Otherwise I would stay as far away as possible.
As for Virtue, I have met so many friends there. It's generally RP light, as most players tend to talk OOC most of the time. There are a few RP heavy players, but I've never heard any of them call anybody else out on not being RP heavy enough. Generally it's live-and-let-live. Sure, there is the occasional noob (but let's face it, they're everywhere,) For the most part I am very happy playing on Virtue and would recommend it if you like a friendly community.
Hope this helps.