Some of it is well drawn, and in good taste, but most of it is over the top fetishes. Not that into it, but I do like a few artists. I like pin-ups and such, but it's never been anything I would pleasure myself to. Honestly, it's just part of the fandom, and it will be there. I don't really care if you're into it, but there is a time and place for everything. I think that most furs I have interacted with don't really think about where they post that, or just don't care, and it is quite annoying to be in a chat room talking about a game or a movie, and someone posts some random yiff, not even related to what we're talking about.
In short, yiff isn't that bad, but isn't that good. It's there, and I've learned to accept it. The only problem I have is unwanted fetishes and people posting it where it doesn't belong.