I've cycled through every type of energy bar and most no-brainer snack foods over the last few years. I'd love some new ideas for light-weight stuff that works well on fairly-strenuous climbs where you don't want to bring extra weight. So far, I've gone through:
1) power bars, cliff bars, luna bars, etc etc etc of most flavors
2) granola bars, kudo bars, etc
3) GORP, GORP+chocolate chips/m&m's/etc, honey-roasted peanuts, etc etc etc
4) Gu and many of the copy-cat brands
5) PBJ sandwiches
6) Tortillas and cheese
7) beef jerky
8) dried fruits of various types (cherries, blueberries, mangos, strawberries, cranberries, etc)