The feelings of freedom and serenity that the mountains offer. The exhilaration of speed and fun of doing it with close friends and family. Crazily enough the same things I first loved about the sport when I was introduced to it all those years ago.
Be prepared for the conditions, ie get appropriately dressed with gloves, beanie water proof outer wear and goggles. Get a beginners lesson (I used to teach and in 2 hours most people are able to ski or board on 30% of all the runs after that 2 hour lesson).
Getting prepared for the Snow Season is all about a basic level of fitness and leg strength, I surf a lot which takes care of the first one. For legs I like to ride (not as much as Senior Spike) which takes care of no 2.