hehe..i use "alt-m" for the menu, not f10.
saves me from having to reach up there
but probably 8 or 9...i use em for everything, including the cntrl-group things.
only if i'm not playing terran do i not use them for every spell/upgrade/unit
ie. when im playing toss and im trying to build more scarabs and i tap "s s s s" and my reaver stops and gets killed by a siege tank, i wonder why
but yes, i love hotkeys, cant play a game without em.