I would say best, most well rounded would be PC. The park is mega fun, and there is some really fun tree skiing and bowls and small cliffs off of McConkeys or Jupiter. And the parks are great. If it snows a lot and you're in PC go to the Canyons. They have the best powder skiing in the area. Don't really go to Deer Valley. I hear the new lift accesses some great stuff, and no one else ever skis it because they're too stoked on the groomers, but it's expensive, and you can find much better at Canyons.
Sunny/overcast with a few inches of fresh = PC
Dumping or lots of fresh snow - Canyons.
Alta/Bird are always fun but get tracked way fast, and take awhile to get to from PC.