It's got everything- best and longest runs
Once you go there, you can't go anywhere else
Peak to Peak gondola is magic. I love blackcomb more than Whistler for boarding. The runs are long everywhere and it's got so many trails and chairlifts that you can never get bored. Ideal place for pretty much anybody that loves skiing/boarding. I love this place. It's beautiful.
The only downside is that once you've boarded at Whistler, all other resorts seem lame in comparison.