I, like most people, always just click whatever option is larger and easier to click (or closest to my cursor at the time). It never seems to matter to my experience which I pick. Sometimes it’s the “all” option, sometimes it’s the “none” option, etc.

I feel bad about doing this, because surely someone somewhere is doing analytics on click data and saying: “See! There is a lot of variation in responses to this cookie choice, people are really taking them seriously, we should keep them!”