I prefer real food and at least 20 ounces of water per hour. I like to take light and natural foods like dried fruit, 150 calorie portions of salty nuts, maybe a banana, oat-bar, etc. Nothing fancy, and I don't tend to consume more than about 100-250 calories per hour. Unless I'm on a 6+ hour ride, then I may pick out a 30-minute period where I eat more and ride a little slower, or even stop for 10 minutes.
The only time that I like gels, sports drinks, or other powders is when it is over 38 degrees C., when I find it difficult to eat much. Then I try to sneak my calories and extra electrolites in with my drinks.