When I was 20 years old I was introduced to a business opportunity which had a very solid process which, if followed, would have produced significant results.  At least that's what I was told.
I was a tad bit different back in those days.  I had a rockin' mullet with my hair below my shoulders, an earring, but it was all business on the top ... just a little poofy business since I hadn't yet been introduced to hair product.  :)
The guys I met with, explained how this would be my own business and how, although I was in business for myself, I wasn't in business by myself.  They committed to teach me the same system that many other people had followed to become extremely successful.
I spent some time thinking about it and finally decided if anyone could make it successful, I could.  The only thing was I was NOT willing to cut my hair or take out my earring, and I told them as much.  I remember them smiling at me and saying, "That's fine."  I am sure my chest puffed up and I thought to myself, "I'll show them that I can make it happen my own way and without following their system."
After all ... I was 20 years old making $5 per hour and cleaning houses on the side to make ends meet to support my wife and son ... what could they teach me?   ;)