[scardine]

My pet peeve is the default clipboard behavior, personally I hate when I select text and it overrides the previous content in the clipboard.

[jhasse]

That's not the default in all Linux desktops I've seen.

[bitwize]

There are two clipboards in X11. One is the middle-click-paste, selection clipboard that gets clobbered when you highlight something. But C-x, C-c, and C-v (in CUA applications) operate on a different clipboard altogether that doesn't exhibit this behavior.

[vbezhenar]

And that is awesome feature that I miss a lot in other operating systems.

[bitwize]

It's a wart of X11, which is obsolete and deprecated. Wayland has a single clipboard which behaves in mostly the standard way.

[mixmastamyk]

clipboard and selection buffer are separate, though I think there is a situation that co-mingles them.