Hands down one of the most open, accessible, pleasant guys in Jiu-Jitsu and grappling, as well as one of the all-time greats, Marcelo Garcia. His love of grappling, his smile, and his infectious attitude always transcend whatever he's being asked or discussing.
The guy loves, absolutely loves what he does.
I'm always reminded when he was asked, how he became one of the best, or what makes him one of the best, and with his self-effacing, sheepish grin, he simply says that he "loves it the most".
What's always struck me about him other than his ability is how genuine and open he seems in every single interview.