Triangles are my favorite shape
Three points where two lines meet
Toe to toe, back to back, let's go
My love, it's very late
'Til morning comes
Let's tessellate

(Alt-J, Tesselate)

This hook is material efficient(<25g), quickly printed (<40 min with A1 mini), versatile and extremely strong. Since the pressure is pressing the layers together, it transfers the load directly to the wall. It has 2x 4mm holes to be fastened, but one is also more than enough. Second one is just in case you want to block the rotation

It is a bit pointy and wide, so not everything can be hung on it. I designed it for my shoes, and it works great. If you want some adaptations, just let me know!

Print with a bigger surface on the print plate for best stability.