Worst is when I have a full board and schematic, but its for some other EDA program. Importing EagleCAD shit into KiCAD is agonizing, endless tedium. It's not like I'm not grateful to have free and open-source designs (specifically I'm talking about Adafruit, I like them, but all they use is EagleCAD), but goddamnit why can't it just be easy for once :(