It's almost all I play, and it's all I want to teach. A good BF guard entails so much of the right way to approach BJJ: aggressive hand and grip fighting, using your hips and upper body in coordination, getting a feel for getting under people and taking their balance, transitioning between attacks as uke continuously defends, using movement and frames for defense rather than just super strong grips, and above all having a ravenous hunger to get the fuck on top by any means necessary. It's maybe the only guard where you almost cannot stall as the person on bottom; it forces you to be active. I do love it so.