I have been to Solitude, Brighton, Alta, Snowbird, The Canyons, Park City Mountain, and Deer Valley.
The terrain found in Little Cottonwood Canyon at Snowbird is my favorite of any of the places listed above. The most difficult terrain is very easily accessed, and requires little work.
Lift lines are reasonable for a place of such popularity. Little Cloud can become a little congested at times.
General canyon advice - wake up early on big snow days because there is a line forming to get in to Little Cottonwood Canyon by 8:30 A.M. If you have a 2wd vehicle and it is 4x4 or chains required, you can ride a bus up for $3.50 one way, although the Park & Ride lots can be pretty busy, so plan this out beforehand.
The Mineral Basin area is the only area of its kind at any of the places I have been to. I can't give out any more information on the goods beyond that. But for those determined, Snowbird offers everything a skier has come to look for.
If you are a beginner don't be discouraged by the praise of Snowbird's difficult terrain. Snowbird pretty much dedicates the whole Baby Thunder lift to still aspiring skiers. Although to be fair, none of the Big Cottonwood Canyon or Little Cottonwood Canyon ski areas have the endless selection of easy groomers that the Park City area resorts have. But you didn't come to Utah to ski them, or did you?