I’ve been mostly annoyed/disappointed by getting the “Badge” things.
I see that I have notifications and think somebody sent me a message or replied to a message or wants to discuss one of my books, or one of theirs, and then it turns out to be just some “you got a badge” message.
And usually, for something insignificant, or with a confusing/misleading title that leaves me thinking it’s mistaken. (Editing my own message is considered to be an achievement?! Really?! And the corresponding badge is “Editor”, when I haven’t even been ASKED to edit, or even critique, anyone’s work?).
Whatever. I figure sooner or later I’ll accumulate all the “badges” that are associated with the way I in particular use the site, and then the system will just shut up and let me get on with it, leaving notifications for messages that are actually relevant.