My old boss in Spokane told me to never pre-fill screw holes, and I finally saw why.
He said it was a waste of mud and time, that you should just tape right over the screws. For years I did it his way, until a job last month where the homeowner wanted level 5 on all the walls. I did my usual thing, but when those walls got hit with the bright work lights, every single screw dimple showed up like a sore thumb. The head contractor made me re-mud the whole room, which cost me a full day and about $150 in extra material. Now I always put a tight coat over the screws before taping, and the finish is night and day. Has anyone else had to unlearn a piece of advice that seemed to save time but actually hurt the final product?