Ok-I have skied all over the world, minus Hokkaido and AUS/NZ (they are on skiing bucket list). For ambiance, apres ski and general support of skiers (buses, trans resort passes, types of places to stay, close proximity to slopes, etc), Europe hands down the best. You have lots of choices. Switzerland is beautiful, but definitely more expensive: my favorite Swiss sites are Laax Flims and Engel....Porte du Soleil ( can ski CH and France) is great, too. France, I like Val d'Isere - huge and lots of different terrain. Austria is nice and probably the cheapest skiing- Sud Tirol has definitely made the linkage between resorts wonderful. You can ski all day and never repeat. The famous Pachnaklamm (sp) professional downhill race in Austria is an amazing experience. That is a national party for Austrians.
Now, I've decided that my absolute favorite in Europe is the Dolomiti in Italy....for many reasons: gorgeous scenery that is so cool (I've hiked the Via Ferrata there, too), the Sellaronda, a CW and CCW ski circuit with connected runs and lifts that wends it's way through different towns. Add the Dolce Vita Italia food and fun...awesome!!!!!!!
Sort of off topic; the absolute most challenging skiing with regard to vertical I've done is in Chile, South America.
In the USA, Alta, Mammoth Mountain, Copper Mountain, Winter Park, Sugar Bowl, and Squaw Valley are my favorite so far...I will get to Montana and Idaho soon.
I give you my opinions above based on having skied most resorts in several continents. PM if you want more specific info.
BTW- COVID has really shut things down over here in Europe. Germany is trying to convince Austria to cancel the season...as far as I know, no lifts are open. I was supposed to ski twice already, but all cancelled.