When I was ten years old, my dad and brother did judo, so I went along because I felt like I was missing out. They eventually gave up, and I continued, then moved into Tae Kwon Do, kickboxing and various other martial arts. I did lots of different things, but mostly things like Wushu, Jeet Kune Do, Krav Maga and stuff like that.
I do find violence entertaining, but that doesn't make me a bad person. I grew up watching all these action films when I was a kid. My dad would bring back 'Rambo' and whatever, and we'd watch it together. It's not affected me in any way other than I just appreciate the entertainment value of violence on film.