With programming, it was a combination of boredom and having copious amounts of free time after school and on summer breaks. Not having much of a social life and poor self-esteem also helped. Add in a good amount of social anxiety and well... there is your answer.

Can't say it wasn't fun, and it definitely pays the bills now. But I would trade it all to be in a mediocre rock band that plays crappy hole-in-the-wall clubs in tiny godforsaken midwest US towns on Tuesday with a midnight time slot. But I was never good at guitar.