Like most people here, I'd say sloth, but closely followed by gluttony and pride.
Wrath and envy aren't really there.
As for lust and greed, I'd say they're somehow there, but not really. When I think of greed, I don't mean it in the traditional sense ("intense desire for wealth, power, money or food"), but more like... hm. Well, I like to keep my friends all to myself when I'm with them.
I put Sloth and Gluttony. Sloth is pretty much all the time. Sometimes I lay around for the entire weekend doing nothing but sitting around on the internet, even though I have a ton of things to do. I could stay in bed all day if I didn't have things I'm required to do. I'm pretty slow moving, it takes a lot to get me going. Gluttony, sometimes when I'm bored I eat things or I eat more than I have to. It's a bad habit.