My wife listened to me well and got me an awesome present this Christmas. She bought me two really nice large blank unlined hardcover notebooks with sturdy bindings to use for my DM's notes. She got my name inscribed on the front and a dark brick red cover that reminds me of some old textbooks I have. I usually scribble my notes in random lined notebooks, on graph paper or in art notebooks. None of those typically hold up well in my backpack as they are used heavily for a year. My usual DM's notebooks are a tattered wreck by the time I fill them up and move on to the next one. These feel really solid, the binding looks great and the book opens up rather nicely.
The stats: 168 pages, cover dimensions: 13 3/4" x 9 1/8" x 7/8", inside page dimension: 13 1/2" x 8 7/8"
Here is the new book open to my first page of notes, with my other active notebook of standard size paper open on top of it for comparison.
Here is the book closed with the regular notebook closed for comparison.
After I fill up these two she is going to buy me new and different ones, so from here on out I will have an awesome collection of my DMs notes, well bound in sturdy hardcover.