Breckenridge is big and busy. There are tons of newbies and families. So if you are a newbie or a family this is the place for you, leave the other resorts and backcountry for guys like me.
Break has great terrain for all skill levels, the lower areas just get over crowded during the days and the weekends. The commute to Breck from Denver on Friday afternoon and Sunday evening is horrible. Make sure to come during the week and you will have the place to yourself.
I rode here the week before the Imperial Express opened but I can imagine that it is changing the way Breck rides.
The parks at Breck are excellent and expect to see X-gamers and Olympic medalists hucking big airs in the pipes and parks. And if you see Hanna Beaman give her my number.
Breck is where I learned to ride, I make an annual trip if possible. I recommend you do to.