Thats not so bad, I've played with a friend since launch, and he's going Death Knight.
The problem with that is we've leveled up every class in the game, and now I have to pick what I want (not DK),
I started playing a Mage at first, then he came to play and we did a Warlock and Druid in our first raiding guild, then we did Paladin and Rogue while we were in the middle of AQ40 and pissed everyone off!
Stayed on those through Naxx, then quit. BC came, he wanted a Warrior, so I thought it'd be good to keep my Paladin, raided and arena'd on those through Kara/S1. Raiding as a DPS Warrior fucking sucked in BC compared to vanilla WoW, mission abort, reroll Hunter. Fuck I hate Paladin, reroll Priest Raid on those through BT and S2 Arena. You know what to hell with the Alliance! Reroll Priest and Mage Horde!
After those got to 62 and of course didn't work out, we made a Shaman for me in our spare time which also didn't work out!
So basically, I have to pick between everything EXCEPT Warlock, which I sold mine in T3 gear way back when for 800 dollars right before BC.
This is why I have a giant shelf of unbeaten console games.
The remedy decision for LK seems to be, pull the fucking plug, erase everything but my Shaman (for my main) and my Mage) (for my alt) and he is going to use a DK (for his main) and a Priest (for his alt).
One main, one alt, one dps and one healer per. All balanced, everyones happy, NO MORE FUCKING REROLLING.