I've considered it, but I link to my yt tag rather than a particular post in my signup, so if they want to see earlier letters I don't really even need to copy-paste. (That's what I did last year, just linked to the tag and said 'if you want to know more, there are ten years' previous letters in the tag' and it worked just fine afaict.)

But... I don't have a nice clean list of likes and dislikes, as is probably evident from my letters. It's all relative. And things change from year to year - three (and a half, if lost_library counts) of my requests this year were redos, and while most the stuff from previous requests was still valid, I found that I had different stuff I wanted to say - I did almost directly copy some of the 'this is what this fandom is' stuff, but when I got to what I wanted from the fandoms, I ended up deleting everything I copy-pasted and starting over.

And figuring out that stuff about myself and what I'm looking for and what I like and why, and how it's changed and hasn't, and then how to phrase it so it'll work in a letter, is really as much the point of the exercise as giving guidance to my writer. ^_^ Because tbh my writer doesn't need any guidance - I only request yt fandoms where I would genuinely enjoy any well-written fic in the fandom at all - so if I didn't want to write the thing for myself I wouldn't bother with one at all.

...it's still exhausting.