I'm just going to say it. I know a lot of people are going to disagree with me but Little Cotton Wood Canyon, Snowbird and Alta, are way overrated. They have vertical and steep terrain but so....many...god damn people.
Traffic in LCC is just ridiculous on a pow day. I have spent too many mornings waking up @ 6AM and waiting in line for the road to open at 8AM just to have it delayed every hour till 11AM. By the time you get up there, you have a couple of hours to find the stashes which are few and far between due to the sheer amount of powder loves that go there.
I am a fan of Brighton, Rock Gardens off of Milly lift are awesome. It's in a roped off area, "Ski at your own risk" and it scares away a lot of people. Fresh snow for days.
That's just my opinion. Bird and Alta can be fun but like I said soooo many people.