I have been riding 8 years now and I see people slacking often, even me at one point or another. I still do it as I always have goals, they are comp based......win a comp, come top 5 that year, move up a cat etc, now I have been moved into masters at the worlds that makes me want to ride even more, now my next goal is to do as well as I can at the worlds. I guess it can be moved to street riding as well, but I cant see it being as satisfying.