MUJI dot grid notebook. Because: I love the company’s "that’ll do" philosophy; They’re easy to open and stay flat while open; ~6×8" size is a great tradeoff between portable and large-enough to draw; They’re sturdy enough not to fall apart by the time I’ve filled them; The dot grid is equally good for note taking, diagramming, and drawing although they do sell plain, ruled, etc.; They’re not too expensive nor precious (I like the liberty of being careless with the amount and variety of note taking and mark making. Precious notebooks can stifle that).
I personally dislike ring bindings and always go with the thread bound ones.
MUJI dot grid notebook. Because: I love the company’s "that’ll do" philosophy; They’re easy to open and stay flat while open; ~6×8" size is a great tradeoff between portable and large-enough to draw; They’re sturdy enough not to fall apart by the time I’ve filled them; The dot grid is equally good for note taking, diagramming, and drawing although they do sell plain, ruled, etc.; They’re not too expensive nor precious (I like the liberty of being careless with the amount and variety of note taking and mark making. Precious notebooks can stifle that).
I personally dislike ring bindings and always go with the thread bound ones.