Their algorithm change really killed the recommendation engine for me. I don't mind new content for channels I'm subscribed to. I don't mind similar content to channels I'm subscribed to. I don't like revisiting YouTube after 3, 5, and 10 days later to see the same 3 videos recommended at the top. I don't want to watch a single video of prolific channel and then have their uploads clog my feed.

I want to explore. I want stuff that's familiar, similar and also unrelated that I would potentially like. Their "related" stuff is always so similar that it falls into "more of the same". You used to be able to explore without entering search terms via trending and categories, but the same channels and types of videos dominate those avenues. If you don't like the type of stuff there, you'll spend a lot of time being disappointed for maybe one video that was alright.

It's ok to recommend more of the same, but give me a way to see stuff that isn't the same.