I don't ever use the start menu for anything. I can't be bothered to look through that mess.
Instead I press the windows key and type the first few letters of whatever I need, unless it's already stickied to the bar. It's fewer key presses than clicking through the start menu. I suppose that still counts as opening the start menu, even if I don't use the actual menu structure.
I also use the windows + arrow keys to toss windows around the multiple screens. It has a lot of other purposes, like creating extra desktops etc, which I admittedly never use.
It's a useful button for sure, but it does get a little overwhelming when combined with shift ctrl or alt . I can't possibly remember all the uses, but I have the most commonly used on muscle memory.
Once upon a time the west. (Ennio Morricone)
Blade runner (Vangelis)