This might be good for other feed readers, but I'm mainly looking at it for Bloglines. When I discover a new feed, I ask myself whether it's worth my time or not. Most of the time, they aren't; but you won't know unless you give it a shot. The problem is that I read so many feeds, I don't always realize which ones are the good and which are the bad. Even worse are the aggregated feeds that come with both the good and bad. Heck, I've wanted a solution to the latter for years, now. Anyway, I have a potential solution: let me rate the feeds I'm watching. I don't care to share these ratings with the feed owners, tho. I merely want to be able to rate the feed's importance to me by noting how many good and bad feeds there were. Of course, since nothing's black and white, a 5-point scale would probably be best. This way, each reader can decide whether or not a feed's worth their ever-diminishing free time. For me, the point scale would be based on value and topic-orientation. I hate when people go off topic too much; so if someone had average content, but goes off topic a lot, I'd drop 'em. This would save me, in the long run, because I could ignore their feeds. Later, of course, I could re-evaluate them. Personally, I don't care about saving ratings after I drop a feed, but it could be useful. Simply having the ability to track a feed's quality is what I'd really like. On top of that, if I could rate
individual authors within an aggregated feed 
, I'd be even happier!