so my two MMOs for the moment are Eve Online and Neverwinter.
I haven't quite gotten into the PVP portion of EVE (which is like 90% of the game), I'm still in the "train my skills, build up my money" stage, and I don't have quite the fleet of ships and money stash that I think I'll need for when I start trying to shoot other people. EVE isn't an "instant gratification" game, crap takes a long time to develop and you play for the long term. I think that was my problem the last time I tried it and didn't stick around. I was trying to get what I wanted instantly, instead of just letting things play out.
Neverwinter is great casual fun, probably the best pure combat out of any MMO i've played recently that wasn't a FPS.