Lots of reasons.
It fills that spot in my soul where Jesus is supposed to be.
I love skiing, because it makes me feel high, and capable, and it inspires me to thank God that I'm alive and so blessed to have such a place to worship, to lay down my fear, to commune. The everlasting Spirit inhabits the body through accelerated awareness necessitated by the speed of decent. I live in the moment, I rest my soul.
Skiing is launching into the abyss of the primal fear of falling, and discovering that I have the ability harness that fear and make it my own source of energy. I love skiing because I become more aware of what a gift it is to be alive.