Absolutely lived on my bicycle from 8 years old... my grandfather's bike from during the depression when he lost the car and had to ride a bicycle to odd jobs to feed his family. It was truly indestructible... we rode everywhere to go fishing, exploring, well you get it; my first adventure bike.
In 1972, my friends dad sold me his '64 BSA Lightning. The engine had been done up for racing (compression waaaay up, cam, etc. it ran like a scalded dog). The dad showed me the controls in a parking lot and off I went. I have no idea how I survived that first year.
Took the MSR course in '05 and was surprised at how many things I'd been doing wrong. But, no longer own a car and except for rainy days, don't miss it.
What could possibly go wrong?