How do you feel when you sit on a bike? Physically and mentally? Are you in pain? What kind of bike are we talking about? I could see where riding a hardtail Hog would be totally different from a Gold Wing trike.
You are headed in the right direction. I also believe that the right answer is not always correct. I would much rather go out a little early if it means that I was happy than sit around being bored to death.
Oh, by the way, if your back is in that kind of shape, what the hell are you doing still in a Rhino? Get yourself a RZR man!
2013 Jagged X
2013 RZR XP900 (Gone)
2011 RZR S Black Carbon Fiber (Adios)
2006 Rhino (Sold)
Southern SxS Rider Member #191