I love bluebird days, but probably only because they are so rare in the Cascades. In Washington storms don't thin out the crowds at all - they're so frequent that everyone skis right through even the most horrible weather. The only thing that cuts the crowds is rain. Rain is bad. Pineapple express rain (a storm that blows up from Hawaii) is the worst skiing condition ever - it's like skiing in a tropical hurricane.
That said, my best ski day ever was in Whistler during a storm. It was raining in the village, but up on the peak it was snowing like crazy. And nobody was up there. On some runs off of Whistler Peak I couldn't even see any tracks - I thought I had gone out of bounds!