One of the things that I'm finding, now that I've reached my goal on leveling my alts, is that it is very difficult to play more than a few of my level 80 characters in a meaningful way. Right now, my druid is generally the toon that I will raid with when the opportunity arises. I use the warlock for PvP and am in the process of amassing a nice wrathful set for him.
For all of my other toons, I've been debating what to do. When I finish completing my Wrathful set on the warlock, it probably makes sense to go ahead and do that on another toon. I've frankly been debating between the Paladin and the Death Knight (I know - very Season 6 of me, right?)
I enjoy playing both characters in battlegrounds a great deal, so we'll have to see how the mood strikes me.
So that leaves me with a whole stable of other toons without much to do with them - Rogue, nah, for some reason, no interest there, Mage - sort of, but if I already have a warlock, do I really need another caster? Priest - I was actually seriously thinking about gearing this toon up next, but then the new talent specs came out, and I just don't get the whole Smite / Evangelism / Archangel thing. Bubble everyone and spam Penance - that I understood, but Smite? Shaman - I've tried resto on this guy as I've mentioned here before and for some reason it just doesn't click with me. Elemental seems good, but again - already have a caster. So maybe I'll try Enhancement. Hunter - I still can't figure out what happened to all my mana and ammunition, so that's out. Honestly, I do really enjoy both PvP and PvE on the hunter, so that might be one that I pick up next. Hard to tell.
I've also toyed with the idea of starting some alts on the alliance side. My gnome death knight is at level 61 and working through Hellfire Peninsula, so I've thought quite a bit about taking him all the way to 80 before Cataclysm. After all, the blog is called Wow Alt Addiction.