I've never really thought about it, I've just taken it for granted that I've always been an internet junkie. When in actual fact, I rarely got to to go online until I was about 12. Even at that stage, I didn't spend much time online, but it's gradually grown to the point where I can spend the entire weekend on the net, provided my parents don't disconnect the router on me.
But my internet obsession started after I became obsessed with GBA games. That grew to include pokemon and then just a vast range of computer-related concepts.
I regret it, to be honest, because it's taken away time I could have spent doing other things, but despite feeling I should, I always stick around for fear of missing something.