I had a go at WoW, its pretty fun and graphically soft and pleasing. Although for some reason, the only game that has managed to keep me hooked was Anarchy Online, before that - Legend of Mir and before Mir - Myth of Soma. The graphics are rubbish in AO but there is more variety and things to do.
However....
Anarchy Online is a bit like Eve in that the learning curve is wild, you'll probably play Anarchy and not have a clue untill your 6 months into playing.
No harm giving WoW a shot, its a well polished and graphically pleasing game.