I agree! Just yesterday the great big gingko tree next door dropped all of its leaves (in 3 hours) as it does every year. We call it gingko snow day. I scooped the leaves that fell in my driveway and piled them over thick cardboard in a new bed spot. I'm trying to build up a bed here because it's over tree roots that are so near the surface the grass mower nicked them. Anyway, gingko leaves are very flat and leathery which makes them heavy and perfect for smothering grass or weeds. I highly recommend them for this purpose, but not as a natural mulch in places where you either expect self-sown sprouts or more delicate perennial shoots in spring. I don't plan to plant in the new spot next season unless I sow some annual wildflower seeds because the leaves won't be fully broken down.
