I was in the minority that thought WOW was the suck compared to EQ.
I did the trial account of D&D online and I actually thought it was a nice departure from the usual routine. That is, go to mob spawn point of appropiate level hack-hack-hack Ding! Repeat.
I thought that simulated GM voice was a nice touch also.
Haven't tried DAoC yet.
I've had some really cool experiences in EQ. Like first time the party I was with went exploring deep into the Hole caverns. We came to the top of this HUGE waterfall and we're all just standing there gawking wondering how the hell we're going to negotiate it when one of us falls off the edge. And somebody made the comment, "ok, lets get our stories straight, he fell right? And things like this happened at least on a weekly basis, whenever I had enough spare time to do any adventuring worthwhile.
Unlike WoW these people could talk about more than anime or saturday morning cartoons. They knew the difference between a pilsner and a lager and actually brought home paychecks. Ok I'm being hyperbolic here, but my condescending generalization is apt.
Another thing about WoW that I didn't like was that there wasn't the same sense of community. There was no interdependancy between players. I breezed through to level 20 virtually solo then had to remind myself that it was a multiplayer game. Yeah, you could group. But grouping in WoW was sort of like some druggies getting together to go in on buying an 8 ball. What I mean is nobody really cared who the party members were or what they did or even why they were there, just needed some extra bodies.