It will definitely be an RP server. Maybe an RP-PvP, or just an RP, but it'll be one of those.
The side you choose all depends on your class. But that doesn't mean that we can't cooperate, I think. They won't do a WoW and have us not able to understand each other, and just because we're on different factions, doesn't mean we have to shoot each other on sight.
It'll have to be Sith Empire for me, as I'm a Bounty Hunter.