This may be a bit too nasty, but Ang Ang is just a boring fairy tale, with no understanding of what BDSM is about. Franky, these stories use it for decoration, like an office or school setting, or dressing up as a doctor and nurse for Halloween, with no medical training or experience. A gimmick.
(Almost) No "realistic" BDSM story would be "Ang-ang-type-enjoyable". A scene in "real" BDSM might be very sexy and fic-enjoyable, but this is not the whole of it. I know, it is about how the author expresses this scenes, but I think anyways it would be too much "fiction" anyways (to be too sexy or "too much" of only the sexy parts). Ang Ang is a BDSM story, a nice one. But still, just a story. Not "real" BDSM.
This is awful. if you wanna know what a nice bdsm story is go read Ang Ang. thank me later.