This is a new account as I'm starting fresh, but I stumbled on this thread about servers while doing a google search.
From launch I was Republic side on Fatman, which then moved me into POT5. Once on POT5, I had significant troubles playing my Republic characters in PvP, as it was really all I did. This is mostly because I work til 1am and I typically play from 2am to 6am at night. I was almost forced to go Empire, and even then I would find myself twiddling my thumbs waiting for a queue to pop at times.
I'm leaning towards playing on a west coast server, but I'll have to check the pings when I get on tonight. I have a 60Mbps connection, so it shouldn't be too big of an issue. I'm all the way down in Florida again. I hope I don't get stuck on POT5 with my light loads at my playtime.
I really think cross server PvP would benefit this game greatly.