When I'm positive and trying to self-improve and feel good about myself, wrath. Have you ever listened to Other Friends on DXM? Nothing compares. Pride also goes hand-in-hand here, as you can't have a good bout of self-justified/self-righteous wrath without some amount of egoism involved.
On a normal day, sloth, gluttony, and greed. I try not to indulge in any of these at all, but sometimes it's hard not succumb at least a bit.
On bad days, envy. Never fun, but sometimes necessary to get through the bitterness and resentment.
I rarely feel lust.