I figure I might as well add to this post.
I am 31, my first sled that I remember my family having as a child was a 1969 SL351 (I think thats the right model. Was white and red with round headlight) with a single cylinder 335 Bombardier engine in it. (Dont ask me how I remember that at 4 years old.) The first sled I drove was when I was 4 or 5 was a 250 twin elan and I thought I had the world by the tail! I still remember the feeling. Guess thats what got me hooked on sleds.
My own first sled was a 1981 540 SRV which I managed to blow up within a couple months. I then bought a 1998 Arctic Cat Cougar 550 and lost 2 motors and a stator in one winter! My next sled was my current sled the 09 Nytro. It wasnt perfect at first but its close now, and I love this sled. When I get another one I plan on keeping this one.