Now, I'm generally pretty easy-going, but I have a few things that aren't exactly berserk buttons, but still annoy me. Bugging me repeatedly about a fic is a good way to really irritate me. Bugging me several times over the course of 48 hours is a good way to piss me off. And to make sure a fic never gets completed, or may take several years to do so.
(In the customer service world, acting like you must must have something to the point of driving the clerk/representative crazy is called "being an Entitlement B*", and it's *not* a compliment. I deal with this kind of person regularly at work, and I don't want to deal with the fan equivalent after I get home. I have limited time to do things fan-wise, and right now, that's prepping for Yuletide and archiving fic.)
ETA: "Song in a Painting" is not going to be updated anytime soon, because the above people would not stop bugging me about it.