Request any fic of mine and I will provide you with a commentary/annotations, like a DVD extra: what I was thinking when I wrote it, why I wrote it in the first place, what's going on in the character's heads, why I chose certain words and anything else that you'd expect to find on a DVD commentary track.
I have a pretty good memory for things, so feel free to request a story from way back if you are so inclined. At the very least I can probably explain why I chose to write certain things, if not precisely what I was thinking at the time.
My stories can be found via memories (may not be fully updated), tags, or the fic roundups. You can also find a convenient, but not complete, list here. I can't do a whole multi-chapter commentary, but if you want to request a certain chapter (or a couple of chapters), I'm down with that.
I have previously done commentaries for Addicted, Books and Backchat, Simple Gifts and The Good Samaritan