I hit 70 (highest level in WoW at the moment) on my (holy/healing) Alliance paladin several months ago. It was my first character to hit the level limit.

After healing for a while after hitting 70 I realized that I don't want to always be stuck in that role, I wanted flexibility, particularly if there happen to be more healers than needed. So I more or less parked the paladin except to do things with friends here and there, and have been focusing on levelling my warlock to 70.

I also want to try most the other classes to level 40 or so if possible.

And at least one of them I'd like to level to 70 on the Horde side, I feel like I've missed out on 50% of the game as far as quest lines go. (I know that 60-70 is mirrored for both sides for the most part)

Raiding / end game sounds too much like a second job. I want to see some end game locations once or twice, but loot is meh to me, I'd be more interested in seeing the place for the art and effort that was put into it.

So I have plans... I'll be at it for a while.