LOTRO was very fun, beautiful, I enjoyed it immensly but I found soloing at higher levels was not easy, and generally I'm not always able to play at the time of a group I'd want to play with. (That is a good community group I enjoy) so I found myself playing once a week and stopped it.
I continued with CoX an still have an account but am playing it less and less. Simply because I've played it for three years and some odd months without significant breaks (more than a few days) but now just am wanting to do something else.
I recently started playing Phantasy Star Universe on Xbox 360 and managed to hook a few friends, as long as they play, I'll play for a bit (lots and lots of grinding, but to be fair its actually one of the few "SF" themed games that isn't onerous. ( *cough cough Eve* I want to play people or a facsimile theroff, not "The Ship Who Whines", and sure PSU is more light space opera with fantasy trappings, but its fun enough )
Tabula Rasa was neat, but it felt the same as most MMORPGs and the non instancing in beta (and wait line for various quest actions) were a pain, if that's improved it might be worth trying again.
Until then *shrugs* I can't stand WOW (despite loving LOTR Online, somethng to be said for doing things "right" with the feel. Mind you I don't mind the somewhat He-man eaque visualizations of WOW, I just don't like the gameplay all that much)