Need help choosing a martial art?

Okay so ever since i was young i've always wanted to be able to fight. When i was small my parents enrolled me in karate and taekwondo classes. From what ive learned these were mcdojos and they were just trying to get my money, cuz i didnt learn anything and they truly couldnt have cared less about what i was learning or my performance. Recently i watched a Bruce Lee movie as well as and episode of Fight Quest where they go to japan to learn kyokoushin karate. I know these are bad things to go off of, so i researched martial arts alot. I am now positive that i want to learn a martial art of some-sort. I'm looking for something where I am able to spar in class as well as affect me mentally. I have looked into kendo, kyokoushin karate, and boxing. Are there any other martial arts i should look into, especially in the tree of karate? What happens if i do all three?