For me it's the first vid I made and the second fic I wrote (same canon). I spent So. Much. Time. on them. They were some of my earliest fanworks (also my return to writing after decades), and I was super passionate about the source. I worked on them for months, and when I look at them now, years later, I wouldn't change a thing.

I wrote more, a lot more, in the same canon, but those works are harder to read because my editing wasn't as rigorous (maniacal) as it was for that first piece. It makes a difference!