I'm not sure what the ratio is between owners of a single motorized bicycle and those who have more than one.
A couple of years ago there was a thread asking how many bikes do you own? http://motorbicycling.com/showthread.php?t=44165
For those of you who have, or have had more than one bike this thread is for you.
Today I took a bike out for a ride and while I was riding it occured to me that of all the bikes I've built and owned, it remains my favorite. It has performed perfectly from day one, never failed me on long or short rides, is comfortable to ride and because of the way it looks gets a lot of attention. It has just over 2000 miles on it and it will start within ten feet of pedaling even if I haven't ridden it for weeks, or months. It is quiet, smooth and fast. It will easily do 42mph but I usually never exceed about 25 to 28.
I wouldn't consider selling it or ever changing any aspect of that old bike. You just don't mess with perfection.
If you look in my profile photos it is the old beige and brown bike with the Norton decals on the fuel tank. If it could be improved it would be the addition of a suspension fork but they are hard to find to fit that Schwinn Jaguar frame and accept disc brakes so I don't plan to be doing any changes anythime soon. The 'Norton' bike was my fifth build and I've added several more after it. But, I've not had one since that has compared to that one.
Just asking, do you have favorite bike, and why is it your favorite?