I'd like to be able to filter out what's in my feed, too. I get a lot of notifications that I don't care about, mostly from those I follow rating random stuff , and would like to be able to filter them out completely. I know we can already select what's shown when we access our feeds, but that doesn't prevent unwanted notifications from appearing, and you have to manually select what you want to see each and every time. It's tedious.
I don't want to be notified of one person rating a bunch of different things. I don't care. Like Sharm, I just want to be notified of new projects and updates.