Normally when I go skiing, I hit up Breck or Vail. But Copper is definitely another place I like to go. It has some fun runs, is good for traveling with people of different skill levels, and is cheap!
Compared to other resorts, Copper is a lot cheaper. If you don't have an Epic Pass, Copper is a good option for the cheaper mountains. It has a lot of runs for a smaller mountain, and still pretty good ranges of difficulty.