Hi all!
I started my self-hosting journey a bit ago and currently host my own instance of Immich. With almost 30k pictures I feel like I want to find the best pictures and print an actual album for each event/trip/etc whenever it makes sense. I was wondering if there are any self-hosted options for this where I can, given a specific album (or folder assuming there is no Immich integration) it will choose the “best” pictures for printing (I understand that “best pictures” is very subjective).

Maybe do some deduplication first? https://github.com/qarmin/czkawka
That certainly would thin the pile and cut down on the manual labor aspect. It uses a hashing method, iirc. Used it to thin out duplicate audio files, being careful not to delete files that might have the same filename but one would be a live rendition, and a studio/album rendition of the same song. Jimi Hendrix, in my experience, is notorious for this. One of the things that I dig about him, is that he never really performed the same song the same way. He sort of just really went with a stream of consciousness and pulled it off quite well.