Killington is known for their nightlife...I can't speak to Stowe. Killington is also one of the biggest resorts in the NE so you'd probably have more than enough terrain to keep you busy for a few days.
Stratton is good, pricier but its also near a few smaller mountains (Bromley, Magic, Snow) - all VERY driveable.
Don't do Okemo. Boring mountain IMO, plus it sees a lot of yuppies. You'll see more people wearing jeans down the hill than...well...I don't have a good comparison but you get it.
What else...I'll ponder some more....