Mostly Rift for MMOs. It's grown older and very quiet, but it's a huge world/system if you haven't tried it.
Lately I'm trying more TCGs: Shadowverse (lovely gameplay effects, but I'm mixed about the grind and themes) + Chick Wars aka Cunt Wars on browser.
Thanks. I dunno if I really have room for another or not, but I'll peek at some reviews....If you like online TCGs, I’d recommend looking at Eternal. It’s probably the most rewarding free to play TCG I’ve ever played.