My favs in order:
Whistler/Blackcomb (has everything)
Kirkwood (good vibe, great big mountain skiing, crazy snow)
Snowbird (great big mountain skiing and snow)
Alta (ditto)
Taos (best snow I've ever skied; small but great place)
Squaw (massive, great big mountain and park, but home to a lot of dickheads)
Vail (massive, good lifts and well laid out, back bowls fun, but not great big mountain skiing)
Alyeska (shitty facilities and lifts, but we've gotten a crazy amount of pow this winter, so I can't complain)