Very impressive lists out there. Here is my recollection:
Europe:
France: Tignes, Val d'Isère, Val-Thorens, Les Arcs, Les deux-Alpes, l'Alpe d'Huez, La Clusaz, Chamrousse, Flaine, les Sept-Laux, La Grave, Serre-Chevallier, Méribel, Courchevel, Valfréjus, Chamonix
Switzerland: Verbier
US:
NY: Hunter, Windham, Whiteface
PA: Blue Mountain
VT: Okemo
WA: Crystall, Snoqualmie, Stevens Pass
So many mountains, so little time...