Dungeons and Dragons Online is a bit of fun.
Lord of the Rings Online is comin soon ..in beta atm.. can sign up for it.
I've just looked at some of the screen shots and read a bit of the forums so far .. lookin forward to playin it.
Both have very nice looking environments with LoTR being more of an 'outside' adventure and D&D focused more on dungeon crawls.
(yes .. I have jumped in my seat when a trap went off during a dungeon crawl in D&D ..video, sounds, effects, characters ..it's all good

Everquest 2 combines both ..but ..amazing to say .. the graphic quality is not as high as the above.
Just my 2 copper.
-GE (WoW just seems too simplistic, kinda cartoony ..no doubt the art director there thinks it 'pops' ..I prefer a more 'realistic' look.)