I like Su Dong Chen's Xingyi. From the clips I've seen of him Su's pedagogical method seems to be to make everything he's doing as obvious to his students so they understand it. Its easy seeing from the video linked above how the five fists blend together into this sort of application, which again Su makes sure to demonstrate the mechanics of for the interested watcher's benefit. I've always thought it'd be quite cool to learn Su's Xingyi...