I have a level 16 charr ranger and a lvl 18 Asura Necro. The necro is my favorite by far. The ranger is OK but am not really liking the spell tree progression as the character will level . I also started a human ele which I tried in beta and really liked. I'm pretty sure the necro will be my main.
The only time I had trouble with lag of any kind was on the first day. So far grouping has gone really well. The few times we end up on diff overflow we seem to travel to the main map pretty quickly and end up together usually within a few minutes.
I can't wait to get high enough to run my first dungeon. Will be fun to see