I practice Xing Y and Chen Taiji. I try to see all the possibilities of applications. BUT, when I see the BJJ folk, I see myself being able to handle myself fairly well while on two feet. Then if they happen to take me to the ground, it looks like it would be over fairly quickly for me.
Mind you, I don't mind having expertise in BJJ, but I don't want to spend 4-6 hours a week with my face in another man's crotch or armpit. And then there is the Ringworm and Staff infection thing.
Anyway, just thought I'd share.