Writing Tools: Notebooks, the Kind with Paper

From the time I was in grade school all the way up until after I graduated from college I wrote in notebooks. It seemed such a natural process that I wonder now how I got away from it, and why it was such a revelation when I took up writing in notebooks again.
In my school days I used to carefully comb through available notebooks and select one with multiple subjects, college-ruled. Usually it would be a spiral-bound Mead, 8 1/2 by 11, but sometimes I’d experiment with slightly smaller sizes. When I was older and wandering through the Kansas City Renaissance Festival with my wife, I purchased a lovely Celtic leather notebook cover with an unlined sketchbook, and I filled a succession of replacement sketchbooks between those covers with my scribbles for years after.
As striking as that notebook was, though, I eventually fell out of using the thing. It became impractical to drag it wherever I went: my student days were over so I no longer had a backpack over one shoulder, and I didn’t have the kind of job where I always toted a briefcase. In those rare instances where I DID have a briefcase, it was already so loaded down that something weighing as much as a hardback book was a nuisance. I never used a notebook for writing unless I was at home, at which point I might as well have been writing on the computer. I thought that I had “outgrown” the use of a notebook.