I've only skiied two days in Utah, one at Powder Mountain and one at Snowbasin.
Powder Mtn., impressed the shit out of me for exactly the reasons mentioned above. No one there, a good bit of terrain to ski, very down-home local feel with absolutely NO pretense. The mountain layout is a bit odd, making for some shorter than desirable vertical in spots. But, due to the fact that there's virtually no one there and LOTS of acreage, it makes for great bomber skiing. I never had to worry about nailing people traversing the hill, could ski as fast as I wanted, and there were still fresh tracks nearly 10 days after the last dump. That impressed me. That said, there are virtually no facilities to speak of.
Snowbasin on the other hand had a very nice eating facilities and the skiing was great, but more crowded. The layout is a bit more conventional (no pay per use cat access), but there's still great terrain to be found. Once again, I ventured off toward skiier's left of the Olympic DH start and found fresh tracks at 2:30pm nearly 10 days after the last dump. Nice (the outlet out of the drainage was a little harrowing though on tired legs.)
I have no idea as to what accomodations in the area are like as I was staying at a friend's place.
Both great mountains, very different feels. Snowbasin is definitely the more family/resort oriented. Powder Mtn. is not a resort. It's a mountain... with a little bit of lift access.
I'd definitely go back to either, though.