I actually switched over to the Vashj community because I didn't care for the community on Aerie Peak. Every community has their bad apples, though.
I made some mistakes when playing with Aerie Peak players and they flambeed me and proceeded to do so long after learning from my mistake. One was also a healer who had enough time to scold me on BG chat but not enough time to throw me a heal. That makes me feel excluded, not included. So, for it's worth, you can keep your community at Aerie Peak. Some prefer it that way and that's cool, but it isn't for me. So, play on the server of your choice because you enjoy that community. Just know that not everyone thinks or feels the same way as you and that it isn't wrong just because it's different from what your idea of the perfect community or group is. However, making slights at the community on their server thread hurts the F2P scene overall and reflects badly on your own server.
I actually do play on both factions with my preference being the horde, but I'll keep my small community of bads if it means not being scrutinized and scolded for every little thing I may do wrong. I'm not the greatest player and I'm not the worst player, but I play for fun. I'm not here to impress people or change their viewpoints, however, I felt the need to chime in and say that Vashj does have a community and that although it's not as big as Aerie Peak, that doesn't mean it's a bad one, as a result. If you're not playing for fun then you're just doing it wrong.
Vashj Strong!