As it happens I've always been surrounded by music. There was lots of happy-clappy interactive music at my primary school*, a strong music curriculum at my comp and my parents had a fairly healthy record collection (Beatles, Clapton, Genesis, Fleetwood Mac etc), but none of it really moved me.
It wasn't until I heard Soul, Reggae, Funk, Jazz and Hip-Hop that music really clicked for me. From then on it became an obsession.
*The negative association of music with religion probably didn't help.