What's+your+favorite+online+poker-playing+site?

I've tried other poker sites, and I like the layout of Poker Stars the best. I used to play for fake chips at partypoker. I've played at Full Tilt and hated the avatars. I'm sure everyone has their favorites for some reason or other. What's your favorite place to play online? Why do you prefer that site? Do you prefer to play online or live? When you play online, do you multitable?