I rarely ever make sketches. I don't ever fill sketchbooks with drawings; a glance through my sketchbook may reveal a few ideas that are really worth developing, but by and large, its empty. I have taught drawing; it is easy to see the difference in the drawings those who draw regularly and those who don't.
I see the value of the sketchbook.
It makes me question my own dislike of drawing: Is it because I think I'm not good at it, or because I'd rather paint or do printmaking? Is my time better spent working on the final product, or visually developing the idea behind it? I know that the drawing can be a final product in and of itself, but those aren't usually done in my sketchbook...
I drew in my sketchbook today, something that I definitely plan on returning to. I also periodically reexamine my sketches, for ideas that could be developed further or something I could incorporate into whatever it is I am currently working on.
Sometimes I think that maybe I don't dislike drawing as much as I think I do. For me, it is a means to an end, catching ideas and images before they are forgotten and helping them grow...as they help me grow in my artistic ability.