Is there a way (maybe using some script in nautilus or something) so that you can drag files with the right mouse button and when you release, you're shown the context menu?
If it can even be achieved using some modifier key + left button, I'm ok with it. But Shift + left button (lb) forces a move, Ctrl + lb forces a copy, Alt + lb does a "move window", Super + lb does... well... nothing special, I believe.