Blogger Guy John Collick's account of his quest for a perfect notebook is detailed in this nice post.
"When I worked for Scotland Yard in the 1980s I had a Filofax, which was pretty standard for people living in London at the time. I took it with me to Japan and used it for all my notes and planning until it fell to bits, at which point I bought another. I still have it now, faded and battered, though I mainly use it for my notes on the memory systems of the Ancient Greeks and Romans..."
Filofax, Moleskine, Ciak, Cartesio and Midori are mentioned.
Most of us may go through dozens of brands til we settle for a favorite or two. Some want uniformity; others see their choices as markers along a journey, unique and memorable.