Online:
#1-Millsberry
Why:
I like it because it's a fun little virtual town. I love decorating my house and playing games on there. Some actually make you smarter. I also like changing my characters clothes.
#2-VMK
Why:
I like VMK because it's like Millsberry, but WAY more virtual. On this one you can actually walk around and meet real, live people that are on it at the same time as you. I like making new friends on there and playing the game, POTC.
Now this is an extra one, but I also like two specific offline games.
Sims and Diner Dash! Both very addicting, and mind-controlling. =]