Copper Mountain in Colorado is the best for snowboarders... so much powder to ride on... and its not that crowded as other resorts.... i also like keystone.. because they have night skiing... and its great to spend a whole day riding...lol...
Because I've already been to Vail a few times and Powderhorn here in Colorado I have to say the more beautiful resort I've been to is Utah's Park City. This place is awesome at night!
Just what I was gonna say. Whistler/Blackcomb, Silver Star, Big White, Revelstoke, Lake Louise, Fernie... The list goes on. Western Canada is where the best skiing is at.
Lots of good ones in Colorado: Vail, Aspen, Breckenridge. Lots in CA: Squaw Valley, Tahoe-north/south, Mammoth/June Mountain. Haven't made it to Utah yet, God willing I'll be able.