Ultima Online in the pre-UO:R days was the absolute best. Being on edge all the time with the adrenaline pumping while killing mobs waiting for that PK or two to show up and attack... then kicking them in the nutsack and looting their corpse(s)... good times. Or I would just scout the common PK hangouts for some action.
I also played EQ since a few months after release up into Velios, but quit sometime after. I ping ponged between EQ and UO for some time. I played WoW since release off and on finally until I couldn't handle that crap anymore and quit last year. I stuck it out so long because the wife enjoyed the game.
Since I put up with her for WoW, she's going to put up with me for MO. She's not a PVPer but her being able to own her own house has her all giggles.
We both played old school UO, hell that's where I met her.
We're going to play AoC to tie us over until this bad boy is released.