I haven't been to every ski area in North America, but I've been to a hell of a lot of them, and ABasin is at the very top, along with Jackson, Alta, Snowbasin, Jay and one or two more.
A Basin is just about the skiing, no messin' around with pretty, cash-sucking base villages, a'la' Beaver Creek, no juvenile "terrain" parks (the whole mountain is a terrain park!), just snow, steeps, and smiles. The staff is friendly, my 7 and 11 year olds loved the place, and the altitude gives it the best snow in the Summit County - Vail - Aspen area. The place has an Alta vibe - enjoy the act of skiing!