I think it would be beneficial for me and probably many others if everyone lists their group/class makeup (your main group at that) and why you picked it. The pro's and con's.

For me at the moment with only being lvl 3 or so messing around I've come down to

Guardian - Best tank in terms of survivability

Warden - Fast Heals, I love HoT's, the Melee Warden is throwing me off a bit

Illusionist - Great CC , power regen , decent DPS

Wizard - Great DPS, ranged caster - easy to maximize potential.