Are there some readers that do some content curation for you on top of your subscriptions? The biggest issue I had with RSS (besides content discovery) is that

Are there some readers that do some content curation for you on top of your subscriptions? The biggest issue I had with RSS (besides content discovery) is that some people blog multiple times a week while others only once in a while. I would like something that limits the amount of content I get based on how much they post: posts from people who blog only once in a while should be more prominently visible than others. Some way to mark posts as "I want more of that" or "I don't want more of that" would also be helpful to improve the curation without having to manually tweak parameters.