Wow, is everyone playing guardian, or what? I actually thought Squirrel was going to play Necromancer and Luna was going to play Engineer, so I am a bit surprised that you two switched. Lumais has always been a big pally person, so I'm certain he will go guardian as well. Pie was going to play guardian too, and she's not too sure with so many other guardians now. I know at one time Luc even expressed interest in one too though I'm kinda betting he will go elementalist. It's funny too because we had an abundance of pallys in WoW too (Fei, Luma and I all had 85 pallys).
As for me, I'll be going thief or mesmer, depending on what the rest of the group does.
*edit* As far as server, it never occurred to me to pick a server based on server load, unless I see that the server list in game has an annoying queue time. I usually just go with whatever sounds cool. I personally like the names:
Steamspur and Blazeridge Mountains
I am okay going with a logical choice though, such as Isle of Janthir. We can always move around later anyways.