Most played classes?

What are the most played classes? Are there any classes that people don't want to invite anymore because of the overflow?

Hunters, warlocks and rogues.

Roll a tank class and you'll get invites everywhere!

But i want da deeps

I haven't looked at the numbers (can't exactly run census addon on the server anyway) but there's almost certainly too much melee of all classes (besides maybe enhancement shamans, since running enhancement in a dedicated hunter group isn't a bad idea, while there can only really be one melee group). You really don't want to want to have more than one melee group and since enhancement shaman is obligatory for making melee not worthless in terms of damage, that's 4 spots free. Since arms warrior is also optimal if you have one melee group and just 2-3 hunters worth of physical DPS, that's a second spot kinda locked in. For Horde ret pally is also optimal. So that basically leaves all the fury warriors and rogues competing for two or three spots.

Established guilds most likely won't need any tanks either, although for PuGs they're the most in-demand role.

Do not roll Rogue,Warlock or Hunter.

If i was to roll a Class That is good DPS but wanted with alot of chances to Get invited to Dungeons and raids it would be:

-Mage

I would say it is Warrior, Rogue, Warlock. I had 20 Warlocks in an AV once.

I've seen a hell of a lot locks, shadowpriest, mages, rogue/hunter, war/sham, druids. Probably in that order