I'm also a little more competitive like an SP, noticed that I'm more competitive than MANY NFs on this forum even when it comes to debating and things.
I've also gained major self-esteem in my life by bold acts, like I love it when people say "I could never move 3,000 miles away from my family in a city knowing no one or hardly anyone and just kind of ...see what happens." I also used to take risks as a child/teenager, but I would say they were more audacious socially rather than necessarily physically, though I did take occasional physical risks on my bike or something, it was more along the lines of being brave enough to say...become a stripper when I was 18 years old.
I can't stand being afraid to live my life. That's why it's so ironic that I have an anxiety disorder (which I think may be post-traumatic stress disorder, actually) because I'm always taking these big risks...my panic attacks didn't even start until I'd flipped several cars over or totalled them, ran away multiple times, etc....I was well into my early twenties. It was so fucking weird that I was this crazy daring person who was suddenly terrified of the STUPIDEST SHIT.
Classic counterphobic type 6, lol.