Park City- A bullshit mountain that you shouldn't waste your time with unless your skiing park, which is a waste of time anyway. You're in Utah do some fucking skiing.
The Canyons- Best mix between park and terrain. While the mountain may be huge a very large portion of the terrain is not very good, what is good gets old quick. Like other Park City resorts the canyons doesn't get the snow the cottonwoods gets. Also, very few inbounds cliffs at the Canyons, So unless you plan on going into the slackcountry(which is actually pretty decent) don't plan on hitting many cliffs.
Brighton- Decent park, nothing spectacular. Very good terrain and lots of snow. But if you don't plan on venturing in to the backcountry you'll get sick of the resort before the end of the year because it's so damn small.
Alta, Snowbird- Both good choices with killer terrain and great snow. What more could you ask for. You're in Utah don't waste your time in the park.