As for snow skiing, in the North America region the best USA State (obviously) COLORADO
For kids - best ski school -- STEAMBOAT
For bowls and oooo nice --- VAIL
For rain, slush, sorry to say, BUT lovely nevertheless ---> Whistler/Blackcomb north of Vancouver in British Columbia, Canada LOTS AND LOTS AND LOTS OF RUNS, and the tops have glaciers so you can even snow ski in the summer up top. Nicest thing to me about this resort vs others in British Columbia is it's proximity to Vancouver and Seattle the drive up from Vancouver is pretty.
PRETTY! (And maybe awesome snows too) Heavenly at Lake Tahoe, California https://www.skiheavenly.com/ this is a nice you tube blog with good photo and info -->
PRETTY as well, and I love it probably the most of all the ski resorts in the world -- TELLURIDE, Co.
As for East Coast, you risk ice, imho out west is better, BUT VERMONT ...