Our toilet door handles.
They’ve got a sprung latch and a sprung ball-shaped knob, which means that they can be a bit tricky to turn all the way, especially if you have wet hands, or have just put hand cream on. However, if you’ve turned them far enough, the door is very easy to open as it’s been hung well.
Even if we’ve told guests this, there will always be one occasion in the day where they repeatedly pull the door towards them to get out of the bathroom and nearly rip the door handle off.