I generally also end up with pretty stable threesomes and/or foursome (or occasionally more). I don't know if you Criminal Minds, but Sedoretu with morning Reid and Garcia and evening Morgan and Prentiss is currently eating my brain.

The Troll quadrant thing is more difficult, I think, because like melannen pointed out, the fannish zeitgeist has this thing about getting everyone laid, that I actually have problem with the kismessisitude as a lot of my fandoms are lacking in people you can both hate and lust after.