Just ordered disks, advice please?

[Avy]

Played live servers for about 10 years, so I'm familiar with the game in general. I would like to know about the curent leveling environment, and class needs. Are there sufficient groups still leveling up in many zones? Would I be better of making a first character that is easy to solo, like necro? If I really want to group as much as possible, should I stick with cleric, slow/cc, tank, or are there plenty of group opportunities for dps?

On live, my main was always a ranger (Goen on Xev), but I played most classes at one point or another.