A-basin is incredibly small, you'll have skied everything (even the backcountry and hike-to stuff) in about 4 trips or so, but it is definitely tough and fun. Winter Park is good hard skiing, and their park is getting better. Breckenridge is all park, the rest of the mountain sucks (at least by Colorado standards). Keystone sucks, they have no park and the tough terrain isn't as good as anywhere else. Vail is paradise, the best resort in the entire world for park, all mountain, powder, steeps, cliffs, grooms, and bowls. Eldora is hell on earth, crappy weather, crappy skiing, and crappy snow, the only good thing is it's close to CU.
We have an old saying down on the bayou....Blehhhhh!!!