I played FFXI hardcore for 3 years in college. I continue to nostalgia hard over that game.
Since then I've tried Guild Wars (yeah yeah, "CORPG"), Perfect World, NeoSteam, FFXIV (spent a year of my life getting hyped for that game), Fantasy Earth Zero (for like 2 minutes before deleting it from my computer), LOTRO, Champions Online (I did make it out of character creation eventually, but I had to keep coming back to make more characters; too fun), and SWTOR. I would try out STO, but it's being fussy about my Perfect World account and I don't care about it enough to make it work.
Still playing SWTOR (but about to cancel my sub since all my friends have quit) and waiting for GW2. I don't think I'll be able to play a subscription-based game ever again.