I would prefer the flexibility of doing the Breck/Keystne/ABasin.
Breck has some nice terrain from open bowls to some nice fun trails.
Keystone I think has some more advanced terrain on the back side. Nice feel to it.
ABasin is back to basics, its all about the mountain and thats it. Nothing fancy at all and one base building.
Beaver Creek ehhhh... not a big fan of.
Vail is awesome and well worth hittin the bowls on a snow day. Usually the bowls in the back have twice the snow on the snow report. BUT there are some people over there that have some problems with boarders, this is the only resort I ever get that feeling from the people.