Mirror, Mirror feels like the original Trek slashfiction. Sulu hitting on Uhura? That could only come from some sick twisted mind
MU has been camper than an episode of Will & Grace ever since. The crowning glory is Emperor's New Cloak; Garak and Worf's BDSM act is pure joy.
Special mention to
Bound for having one of the few trek dance scenes that doesn't make me want to rip my eyeballs out of their sockets.