I have to wonder how much keyboard macros can really help in sc2. Are there really key sequences which can improve mechanics? I am skeptical but I've never tried it. I guess I can boil it down to this principle:
If the sequence is simple enough to be macro'd, isn't it extremely easy to just do it manually? A sequence of keystrokes becomes second nature very quickly.
There's no way a macro could be useful for microing or unit control. I think it could only be useful for macro mechanics, but stuff like building drones doesn't seem worth macro'ing. Queen injections seem impossible to macro because it requires mouse involvement. Maybe something like a macro which does:
CTRL+9, 1, R button click, 9
Assuming you always hotkey a worker to 1, then this macro would bring your worker to where your cursor is without losing your current unit selection. Maybe could be a way for terran to bring workers out to repair on the battlefield? But again, this seems kinda ridiculous.
So, what macros are genuinely useful?