Bicycle or motorcycle, Bert? If the former, then my comments on bicycling are in response to your post...if the latter, my comments are base on a misinterpretation of your post. Either way, it doesn't matter much in the grand scheme of things. That said.....

Funny you should mention the bicycle, Bert. Other passions and desires come and go with me, and thus I experience what Peter T. describes on a cyclical basis, but bicycling is a constant that requires no willful effort to get me pedaling. I "get lost" while riding, and it seems to be the right speed at which to absorb the scenery: not so slow as in walking where a particular site wears thin on me, or so fast as in driving where I don't have the time or concentration to savor the details of something interesting. One day after I have met all my duties, obligations and responsibilities as a father, husband, citizen and pillar of the community, my dream is to mount up and ride until I have pedalled off the end of the earth. I expect it will always remain a dream, as all of those things will never be met. The only things that keep me from spending more time pedaling are the pressing demands that those roles engender, but during the all too rare moments of time not accounted for, there's nothing else I'd rather be doing.

One exception to walking: I never tire of looking around out in the woods. Yesterday I alighted from the windowless monolith in which I work to discover a stellar day for being in the woods, and actually commented the same to myself out loud. Crisp air, abundance of sunshine, sky was blue and cloudless...and I looked toward the naked treeline some one hundred meters away, and thought that the woods are no less inspiring in winter than in spring - it's just a variation of the same theme.

Regards, Neil