Thank you for asking! I thought a LOT about this because, as is the case with most writers, I like each of my fics for a different reason so it's hard to choose just one. But my answer is a cartography of love.

I feel that of all my fics, a cartography of love is the one that has everything for me: themes that hit really close to my heart, character study, exploration of gen relationships, places and people, and good writing. Certainly of all my fics, this is the one that has been the most rewarding and surprising in terms of reader response. I have been blown away by people sharing with me how much this fic has resonated with them specifically, and every glimpse of a reader's life I get through the generosity of their sharing has stuck with me.

In the spirit of the question, I want to resist giving honourable mentions that would just turn into a list of my faves, so: this is The One ♥