We love to praise linux constantly and tell everyone to change to it (they should) but what are your biggest annoyances ?
Mine would be, installing software (made even more complex by flatpaks being added, among the 5 other ways there already were to install software) and probably wifi power management issues.
I love gaming on my Linux machine, and for the most part it is a pleasant experience. By far the worst outcome is when an update breaks a game that was working perfectly fine. This seems to happen regularly, especially with online games.