My problem with recommendation algorithms, at least YouTube's, is that by design they recommend things based on keywords and categories for videos you have watched previously. So what happens is that I get hooked on some new topic, say cave diving for example. And then I watch a whole bunch of cave diving videos ... until I get sick of cave diving and want something different. But because of my viewing patterns, my recommendations are FLOODED with cave diving videos that I don't care about anymore.
I don't know how to solve that problem. And it might even just be a "me" problem related to the way that my brain works.
If they are not getting rid of the algorithm, it would make sense to let me manage the keywords that are driving it.
On Netflix I have a seperate "user" for asian movies so the main user is not flooded with recommendations for asian movies. Those 2 users have extremly different list of recommended movies.
When I watch a few "The girl is doing her homework" music movies on YouTube they quickly drown out everything else on the homepage. When I later watch a few "watch later" engineering movies, the music videos are drowned out and I then have difficulty finding more music videos. It's like starting over from scratch every time.
https://www.youtube.com/account
Works well to keep different viewing histories and commenting identities separated.