YouTube recommendations have worked very well for me. I listen to a lot of talks and if it weren't for the recommendations I wouldn't have discovered some very interesting talks or even areas. The only time the recommendations derail is when I have guests over and they login into my account (because that's the one always logged in on my roku). But that is expected. And it's easy to get rid of, by deleting the history in a custom date range, or simply by continuing to watch the kind of stuff I was watching earlier.