Well let's see:
Bard - great DPS and good survivability, easy to lvl with and useful in parties due to a bunch of buffs and can cc, in PvP can be great with good build.
Healer - good DPS, the caster build is getting buffed this patch so we'll see how that goes, you can go DPS but ppl will call you out to go FH so if you don't like healing I wouldn't suggest it, has plate so has great survivability in any case.
Mage - great DPS and has cc and useful buffs, can be low on the survivability side of things when you lose the barriers with cloth armor and no heals.
Paladin - great DPS and survivability, you can lvl with a tank, or DPS, or PvP build with little trouble. You'll be called to tank if you take this class so if you don't like that i wouldn't suggest it.
Psionicist - good DPS and survivability and you have great cc skills and useful buffs, sort of the least cared for child of the devs. If you'd like a challenge I'd go with this.
Scout - great DPS and survivability but no heals, has some useful buffs and cc. If you like to stand in the distance and pwn then this is the class for you, but expect a lot of running away.
Summoner - good DPS, great in mass fights, with good survivability in the DPS build and cc, in the PvP or heal builds it has great survivability. This is a good overall pet class which has a bit of everything.
Warden - good DPS pet class with some useful skills, good survivability and cc. It will be reworked in the next big patch so you'll be able to heal with it also.
Warrior - currently the best DPS class with good survivability which goes into great in the tank build, but it doesn't have any heals. If you like to 2hit ppl then take this one.
Engineer - the new class which from the Russian forums isn't all that OP. If you like something new take this one.
Hope this helps.
This post has been edited 2 times, last edit by "Mamojebac" (Mar 18th 2014, 7:36pm)