As I play with a gamepad this suggestion is to avoid my finger from cramping just to keep my macro palettes open.

A user configurable option to make macro palettes sticky, that is, i have to hit the button to open then and hit it again to close them.

As it stands now, since I use macros for most things, I have to keep my finger pressed on the button to open the macro palettes which leads to cramping and pain through time. The option to make them sticky, a la the macro palettes in FFXI would address this issue. Making it user selectable (sticky or not) means my suggestion should not annoy someone else ^^.