Even though I had a car, I used a motorcycle for years as my primary means of transportation. Then one day at 60mph, I had a crash which totalled the bike, reduced the county deer population by one and shattered my collarbone. Even before I healed, I went right out and bought another motorcycle almost twice as powerful as the one I crashed. Somehow, it was never the same and I ended up junking the motorcycle after a few years and began spending more time on my bicycle.
Fast forward to today. I do most of my errands and commuting on a bicycle. However, I purchased a Vespa which has been one of the best buys I've ever made. It's a stretch to call it a motorcycle, but it sure is a handy little devil for some errands and can carry a surprisingly large load of groceries, etc. Last October I bought my wife a little pink scooter (25 mph max speed) for her birthday which she has begun using for her two mile commute. (She's not much of a bicyclist, and we have a loooooong uphill right outside our front door. At least the scooter keeps her from driving her car.)