I run:

Prot Pally + 4x Shaman.
All are Elemental, but one is dual-spec Resto.

Feral Druid + Discipline Priest + Arcane Mage + Elem. Shaman + Aff. Warlock.
My mixed team is fun, but a Pally is far easier to box with.

Balance Druids x5
Tempted to dual spec two of them Feral and Resto.

Affliction Warlocks x5
Haven't started to level these, just configured their windows so far.

Hunters x5
Leveled during RAF, have not touched since.

Priests x5
Same as the hunters above.



The Pally / Shaman team is by far the easiest to play.
They're also the best geared by a long shot, but even as fresh 80's they were the easiest.

I really didn't like the mixed team in instances, especially after the ease of the Pally/Shammies.
I might go back to 5x DPS spec's (or 4x + Disc) and just run dailies, once they hit 80th.

The Druids are very fun to play during the leveling process.
The goal is to PvP with them, but they won't go far in arena with their limited controlled burst.

The Warlocks will be a fun style too, and are also going to be a PvP team.
These will be my first set of horde toons, so hopefully 1-80 will be less of a pain having never taken a horde into double digits.