I personally think the Dillon Marina area was pretty sweet to live around, walking distance to restaurants and bars, Tiki Bar is a fun time. Not the hugest fan of Dillon Valley.
Frisco is a nice area, and probably where I am moving to next. Would love to be able to ride to the Bike Park and not have to drive. Decent downtown area, fairly central location in the county.
Breck was really funto live in, but gets old fast.
Just my 2 cents