It was a bit like eating a smoked salmon, asparagus, white truffle and champagne risotto made by someone who can't actually cook. All the ingredients were fantastic, but had been put together with only the haziest idea of in what proportions, in which order, and for how long. Still, if you prodded the sticky mess and picked off the charred bits, there were some delicious morsels in there.

( Autopsy of an Epic Mess: contains spoilers for both parts of the End of Time )

Anyway, this has kind of inspired me to go hunting fics for my favourite fascinatingly wrong Slashy Nemeses again, and here are some recs:
1. Chasing The Paradox - a lovely, twisty, timey-wimey Doctor/Master romance, kind of sweet and deeply disturbing at the same time.
2. Intoxication - Academy-era fic, in which Ushas has to cope with Koschei's attempts to seduce Theta Sigma crashing through her study whilst she is trying to revise. Fairly dark comedy, in which Koschei comes over distinctly stalkery, with some dubious consent issues.
3.The one where Koschei goes all BDSM on Theta's arse - Academy-era fic, as NSFW as you might imagine, all psychological and creepy with definite consent issues.
4.Bit of femmeslash for a change of pace - Rani/GLaDoS. It really does work.