AOC is the best of the bunch, but I think they FUBAR'ed it by not putting in a better PvP system earlier. It has great potential but for now I don't wish to get back into it.
As for War, I hated the demo. It was as bad as LoTR (IMHO) and only offered the RvR as a neat feature. Otherwise it's just not a good game I think.
WoW is WoW and will be tempting to re join when things are slow in the gaming world, but right now there is just too many good games out or coming out. Right now I play a little Spore, a little of the BF2 mods (hate vanilla now) and COD4 (ACE mod mostly, but some paintball too). FarCry 2 is out Tuesday and that will be the game that takes all my time until COD5 is out next month. Then it will be back and forth between them.