Marmot is kind of my home mountain, with 20-30 days a year. Knowing every nook and cranny can make any hill fun.
Grand Targhee, WY is probably my overall favourite resort. Unbelievable cliff skiing, absolutely no lines, rad locals, cheap on-hill accomodation, all the snow Jackson gets and more, great hike-in areas and super diverse terrain. Another awesome part is a promotion they've done for a few years where anyone with an Alberta resort season pass gets free lift tickets to promote tourism!
Favourite run has to be following the lift line of chair 10 at Vail. I was there two years ago with blower deep snow, its steep and consistent, and there are great cliffs (some in a hittable 10-20 ft range and some deathtraps) you can spot on your way up!