As I stated before I have been riding quads about 20 years. I just bought my CRF250X. I enjoy riding both.
The guys that I ride with are all mature riders that aren't interested in demolishing trails or wallering out mud holes. We hate rutted trails just as bad as anyone else. After the little bit of time on a bike I see why bike riders complain about quads. I also see that it works both ways.
Anyway here are a few pics of my quad and bike.