As much as I liked riding bikes off-road (motor or peddles) when younger it is not something I look to do now. I do agree that either can be great fun.
At this point I am really more of a four wheel person and really think a not so refined, fun to drive, but capable of carrying four people in a level of reasonable comfort (as in not with knees pressed against their chest) is my best bet. I wouldn't have to drive it everyday but could if I wanted type car. I may have start my own what car thread so this one doesn't get off track.
There has been some good discussion and thoughts.