Ski school, tree skiing, cruising, Daly Bowl, FOOD (cookies are great)
There isnt that much advanced terrain and its very expensive
Deer Valley is my favorite resort I have ever been too. There are so many things about DV that are great. I named some of them above. The mountain is huge and has alot of great tree skiing and intermediate terrain. The food is incredible as well. The only bad things are there isnt very much advanced terrain, but you can always go to canyons, snowbird, alta etc.. The resort itself is very expensive, but there is a little bit of cheaper lodging in Park City which is a great town with things to do and shopping and FANTASTIC restaurants.