Primary Chars

• Druid ~ Lvl 70
    Resto
      PvE:  Lvl 80, Lvl 70, LVL 60
      PvP:  5v5, 2v2
    Balance
      PvE:  Lvl 80,  Lvl 70
      PvP:  Lvl 80
    Feral
      Lvl 80, Lvl 69, Lvl 49, Lvl 19

• Paladin ~ Lvl 70 BoE Epics , Frost
    Prot: W/Pursuit, Lvl 70, 10 Man, 25 Man
    Holy: Lvl 70, PvP
    Ret: PvE, Solo, PvP

Secondaries

• Priest ~ Lvl 70 (Main @ 60 // #2 @ 70)
    Discipline: PvE, PvP
    Holy: PvE, PvP
    Shadow: PvE , PvP

• Warrior ~ Lvl 63 (my first 60)
    Prot, Fury, Unrelenting Assault Tank

• DeathKnight: Lvl 62 ~
    Frost Bosses, Trash Mobs, Both
    Unholy, Blood

• Shaman: Lvl 26 ~ Resto
• Mage: Lvl 5 ~ Arcane
• Hunter: Lvl 24
    Beast, Survival, Marks, PvP

All Classes ~ Pretty much all the specs here are designed with instance party support in mind (most of them are horrible at solo ;).
    If your not sure what class you want to start off with, read this article Choosing a Class, or take this quiz.  Or just roll a hybrid class such as a Druid, and figure out what you want to do later.  =P  Geared and talented correctly most hybrid classes (Druid, Paladin, Shaman) can fill any of the three roles of: dps, healing, or tanking (except shaman).

Primaries
(priority roughly in this order)

• Druid ~ With their extensive HoT (heal over time) options, Druids have been and continue to have a stabilizing effect on raid healing.  Making them distinct as a healing class.
   That's part of the reason why I'm dropping my priest.  Try putting 3 healers in a 10 man raid all the same class, and see how that goes (this holds true for any healing class).  It went quite badly when I was with 2 other holy priests, on the Prince in Kara.
   You will get cases where by randomness everyone starts casting the same type of heal, all at the same time, and the tank dies before any of them hit.  At least with a Druid you have the HoTs working in the background, while the healers are casting their direct heals.
    Also the only other class of healer that there are fewer of (on my server) is Shaman.  But they only have direct heals, leaving them (in my opinion) in the same section as priests and pallys.
   Other reason is, that my Druid is going to be an alchemist (my priest is tailor / enchanter. I expect I'll lvl him and his enchanting at the end of this expansion).

• Pally ~ Prior to BC (lvl 60) prot and ret pallys were near impossible to make viable. Raid drops didn't offer anything that wasn't for healing. And the talents were very weak.
    In WoLK the tables seem to have been turned, and now prot Pallys are arguably the highest threat producing tank class. (not that it affects me, but Ret pallys have also gotten a big boost in this Xpac also)
    Personal list of cooldown / situational spells to throw into my rotation: Sacred Shield, Divine Plea, Avenging Wrath, Exorcism, Cleanse, Hand of Salvation, Hammer of Wrath, Avenger's Shield

• Warlock ~ Regarding the PvP specs I have, they are designed with the idea of defending the flag in WSG and other objective orientated goals in Battle Grounds and Arena (with the focal point being curse of exhaustion).
   Its not really designed to pump out fast DPS to get lots of Killing Blows or Honor Kills.
   It appears that a mixed spec with Fel Guard & CoE is the strongest PvP spec.  Although full out affliction does sound like more fun.  Also afflict will be my PvE spec of choice.

Former Mains

• Priest PvE ~ In the past Discipline spec was good when you have more confidence in your own skills and gear, than your party's S&G (IE - pain suppression)
   Holy, on the other hand, was good if you feel that you need some extra help from a mana-efficient, burst healing spec.
   I expect this to hold true in this expansion.

• Warrior ~ My warrior was my first char and first to 60, but my priest is the only one that saw any time in MCore (Lvl 60).
   Also on release of TBC (Lvl 70)  I had trouble holding aggro on multiple targets in Ramparts, so I rerolled Prot Pally (who was my main during TBC).
    I never rolled Arms or Fury… ever (try questing with a prot warrior and you'll see why I hate questing, and to this day I lvl all my chars in 5 man instances).

Low Lvl Alts

• Death Knight ~ Lvling him mainly so that I can say I have an understanding of every tank class.

• Shaman ~ Don't know Shammys well enough to do anything outside of Resto. And TBH, I don't have any desire to either.

• Mage ~ Arcane sounds a bit boring (in groups), but has higher dmg output in dungeons / raids, while still having lower aggro.

• Hunter ~ Keep the pet alive while beating on the enemy.  It would seem that Beast Mastery or Survival is better when leveling, with weaker gear, or as a solo farming toon.  With Marksman being better when you have some epics.
   Although I have seen a Survival hunter pull off some insane 'crowd control' efforts.  I kid you not… 3 mobs were wrapped around his little finger.  One frozen in a trap at all times, one hit with WS, 1-2 running to him (CS, WC).
    It was a redundant effort (I was on my prot pally) but it was just so dam cool to see.

• Rogue ~ TBH I can't make heads or tails of rogue talents.  I'm like a kid in a candy store.. I just want it all.
   If I did make a spec though, because of all my time spent tanking, I'd probably make a spec that would fit that mentality.  Might as well, I'm going to end up off tanking anyway (mostly casters I expect).  Should at least have a spec to support it somewhat.