Breck might have the nightlife, but I hate going to their mountain and being treated like a criminal. Their ski patrol guys are total nazis and target snowboarders, and once even accused me of snowboarding on a closed run when it wasn't closed (and threatened to take away my pass).
So for the most part, I go to Copper. I could care less about the Copper nightlife, as I am headed back to Denver most nights. They have cheap $2 beers too. Oh, and FREE snowcat rides to Tucker Mtn in the back bowls (but they take forever to wait on--faster just to hike up there yourself)
If there's anything night worthy, it's going to Keystone and do the night runs. But watch out, it gets cold, and can get crowded on the powder nights.
Beaver Creek is cool, and Vail is cool too--just don't care for caviar, LOL, and watch out for those 50 year old women wearing fur coats!
A-Basin is for the "glacier boarder" experience, but their lifts are slow and wobbly. And Loveland is Loveland, but it might be more exciting than A-Basin (Well, not sure now since A-Basin recently opened up the backside bowl--Montezuma bowl).
Steamboat is OK, just a long drive for me.
Winter Park is OK, and I'm not a big fan of their mountain since it seems less board friendly--their slopes are sometimes sloped sideways, pushing me into the trees half the time.
Crested Butte--it's been awhile, but they might have the nightlife and resort you are looking for. REALLY out of my way though.