Well, speaking for myself, I like a short login event notification. I find it annoying to see every new comment on every piece I've made a favorite, and every new comment for any artist I'm watching. Perhaps she's like me in that regard. I would have MANY more favorites if it didn't behave like this. Favorites, in my opinion, should just be bookmarks we can use to find the really good things we've seen, and new uploads by our favorite artists. (Not every comment made on their work.) I'd use them all the time if they didn't have new comment notifications. I can definitely say I don't use Favorite and Watch because they are too "noisy", not because I wouldn't like to mark my favorites a lot more.
I might be mistaken about "artist watch" function. It seemed "noisy" in some way that drove me away from using it very much when I first tried it.