My gamertag is destinae for both PSN and XBox Live, though I use my PS3 way more than my 360. I'm also not much of an online gamer. I dabbled in WoW for about a year, played some Ultima Online back in the day and that is it. Why? Because people are generally jerks. There are certain games I'd consider playing online, Dungeon Siege III being one of them.
My favorite game genres (in alphabetical order): action/adventure, first-person shooters, role-playing
Note: I'm very particular about my shooters. They have to have a decent story. A good setting helps (ex. Bioshock). And I'd rather blast monsters than people, though I can make exceptions (Fallout 3 -- though that had both monsters and people).