For a while there, I fell victim to the marketing and only carried so-call "energy bars" and such on bike rides. They are easy to carry, and contain concentrated energy, and whatnot. You've heard the spiel.
However, I changed my habits after one particular ride. Bill and I had been on the trail for about three hours when we came to a nice scenic spot and decided to take a break. I pulled out a Clif Bar, and started eating it. Bill pulled out a ham sandwich and some cheese crackers.
I briefly considered killing Bill and eating his snack. But, I managed to maintain control, and bummed a cracker off of him. The salty goodness was like a side trip to Heaven.
Since then, I have made it a point to carry some savory food on long rides.