I'd find this really helpful if I could select particular repositories. I have a lot of repositories, but I'm only this interested in a couple of them (mostly the thing I'm working on right at this moment).
This is probably not that easy, but I would also be interested in forks where someone made a first commit. Lots of people fork and never commit, I think as a kind of stickier star, but I'm much more interested in people who actually do something with the code.
Also, seems like there's no way to turn it off? I just turned off all the notification events instead.