The ones I do are Muay Thai (Muay Thai is Anderson Silva's striking style, if you want to see him fight look up "Anderson Silva vs Forrest Griffin", or "Anderson Silva vs Rich Franklin 2"😉, Kyokushin Karate, Brazilian Jiu Jitsu, and Greco Roman Wrestling.
Since I use different styles while I fight, that makes me a Mixed Martial Artist.
But if you want to concentrate on just one martial art, you should probably go with Muay Thai. It's considered by many the most dangerous martial art.