Its all about the egg .....
I've owned this sketchbook awhile ... on the first page I wrote the date January 8th 1997. The front cover is grey and it tells me its 11 x 8 1/2 Mead Academie Sketch Diary. "An extremely durable, heavyweight (80#) sketching paper designed for versatile use indoors or out. For pencil, ink, pastel, color markers, and watercolor. Bound with a heavy paperboard backing for support and safekeeping. 70 sheets."
This sketchbook seems to be able to handle it all. I have used all the different medium listed above and the paper seems to handle it fine.
This sketch is from another larger size book. Black cover hard bound. There is no information about the paper weight written in the book but looking at different sketchbooks I think it may be one I bought in a variety store. All purpose sketchbook with about a 70# paper. Just a little different paper from the first one ... This one seems just a little smoother
This sketch is a pencil sketch ... and if I remember correctly I was using a magazine photo as my reference.
This egg sketch is from my 9" x 6" Aquabee Super Deluxe that has 60 pages. I like the size of this book, but I didn't think it took to the watercolor as well as I had expected, anyway not as well as the grey covered spiral bound book did.
My taste has changed over the years. Now my favorite paper to sketch on is the very smooth paper such as printer paper, the pencil just glides over it. I think its yummy.