It wasn't a conscious thing......just circumstances really.
My father died when I was 4 (due to the conditions he experienced in WWII) and my mother was a schizophrenic.
I had no siblings or other family to turn to, so I had to learn to get by on my own. That's basically it.
I do think I was very influenced by The Prisoner though, which I first saw when I was 12.
Specifically the concept of being unwilling to comply with authority, or be manipulated and used by people!