Horde on Area 52, Alliance on Khaz Modan/Azjol'Nerub Belf hunter and blood death knight are my raiding mains.
At most, it's just a shout-out to Area 51, but there's no other relation. Area 52 happens to be the largest Horde populated PvE server.
I went from playing Ultima Online to playing SW:ToR. Never did play WoW, so I had no idea how the new MMO's operated. I wound up getting confused on how TeamSpeak worked (it doesn't turn off when you turn the game off), so for like 2 days everyone on my ToR guild could hear everything I was doing in my bedroom. And I mean EVERYTHING. It's a hell of a way to get to know somebody, I guess.
We require that you use push-to-talk. If you don't, a mod will mute you. Of course the odd side to that is that you get used to doing it all the time. I catch myself using the PTT button on my mouse even when I'm on Skype or on my phone.