My biggest pet peeve is since it's a suite rather than separate programs, there's only one path for saving files that's saved. So you can't have Writer save to a different location from Calc automatically.

As someone with a lot of files and folders, and a hatred of having to click around too much, this annoys the shit out of me. But I don't think there's any way around it because of how the program was created. It's literally the one thing keeping me from switching.