I'd love a modifing key that would let me turn smart guides off.
Many times I am moving something and smart guides want to snap to something I don't want to snap to. So being able to hold down a keyboard combo to temporally turn them off would be great. Just like Shift constraining to 90/45 degree movement.
I know I can press ctr/cmd U to toggle off but then I have to remember to toggle on again. A toggle would be more efficient.