I started playing piano in the 5th grade. I think I was about ten. Had to ride my bike super-geek style to piano lessons after school while my friends were playing ball....
Then, I convinced my folks that I wanted to play drums. Two things killed that. One, my parents would only buy me a "practce pad". As you know, this is no drum set. It got old fast. Two, and perhaps more importantly, my drum lessons were on Saturday morning and I hated missing the Superfreinds... The priorities of an 11 year old.
My parents insited I learn how to play an instument. Dance lessons too, but that's a whole other embarassing story.
When I was twelve, I convinced the folks that guitar was the instument for me. I got an early 13th birthday present of my first shitty guitar (a Conn. What a con.) and amp, I have no idea what it was. i astarted taking lessons shortly thereafter.
I am 37 now and I still suck after 24 years of garage bands.
At least I can afford nice gear now.
I assume I win for the longest answer to this question.