I like that. I'm about to utilize our crawl space that way, but I do have to crawl in it so my time in there will be limited and things will be as close to the door as I can safely put them. I'd say it's about 3-4 feet high in there.
I agree ... I want a root cellar. My grandparents built a concrete storm (tornado) and fallout shelter in the side of a hill on their farm during the 50's and used it as a root cellar. Wish I had it now. You could stand up just fine in there. It wasn't large, but it was a little more comfy than crawling and had benches for seating.