Another surprising area for sharp memory is the taste and texture of cheap candy. Not imported chocolates, but Red Hots, Good and Plenty, Milk Duds, Paydays, Chuckles. I dreamed I got a box of Chuckles with five licorice squares, and in my dream I exalted: "Finally!"
Roger Ebert's "Nil by mouth" is the best thing I've read in a long time. The last paragraph is the killer, but since I'm also a fan of cheap candy, I'm quoting the above.