Some of you will remember this thread from Cata, so (having done a bit of soloing myself recently) I thought I'd get the MoP version going. I know there's some other threads scattered around, but I thought it'd be better to have all the kills and tactical discussions in one place. So I'll start with what I've done so far:
(current ilvl 544 with EM/PE, healing/feral spirit/LS glyphs, MoP agi flask, drums/runescroll III and 300 agi food)
WotLK 10: Everything.
WotLK 10H: XT-002, Iron Council, Hodir, Freya, Thorim (pre/post 5.0 + MoP), Mimiron, Vezax, Yogg+1, Algalon, Jaraxxus, Halion.
WotLK 25: Sarth+3, Malygos, all of Naxx, all of Ulduar except Thorim/Yogg (mechanics), all of WG, Onyxia, all of ToC, all of ICC except Gunship/Festergut/Blood Queen/Dreamwalker (mechanics).
WotLK 25H: XT-002, Freya, Vezax, Jaraxxus, Faction Champions, Twin Valkyr.
Cata 10: All of BWD, first 3 in BoT, first 4 in Firelands, first 4 in Dragon Soul.
Instances: Everything except Mannoroth in Well of Eternity (can't be in 2 places at once to move the RP along).
MoP Misc: All rares, all dinos apart from the big devilsaurs, Kork'ron commanders.