Since they don't have a folder devoted specifically to Brazilian martial arts and so I started this thread. Everybody knows about BJJ but there are other Brazilian martial arts such as Capoeira which is perhaps not as famous as BJJ but is still very fascinating and has quite the history, how it was created by slaves and disguised as a dance so their masters wouldn't know they were training in a fighting art.
I like Vale Tudo. It's more no-holds-barred than mainstream MMA. I think some people think it's mindless brutality, but it takes a focused mind to keep yourself from getting groin-kicked.