i have been playing with paper for a long time, since i picked up wireframe modular origami around 2011. it remains one of my most beloved materials, and i have some particular thoughts on it (and adjacent media).
notebooks
i usually bind my own, ever since learning to do so in 2019. the signatures are simple printer paper (as far from glossy as practical), as i like completely blank surfaces, and the covers are designed to permit them to lie flat on every page.