I don't post much about the awesomeness that is Roger Gracie, but the man is a ten-time world champion. When he talks, I like to listen. People often call his style super-simple but when you watch him in action you realize that his BASICS are just so solid he doesn't need to go flying through the air into some super-spinny technique to get the win. In this video Rodger talks about how the sport has changed professionally and how he is constantly learning and advancing his jiu jitsu.
And just in case you are not sure why you should listen to what Roger has to say -