I don't forgo "cooking" altogether, but I do take a couple of no-cook dinners for those times I'm too tired to fire up the stove (often the first night). Things like hummus and tabouli, easily hydrated with cold water in 1/2 to 3/4 hour, work great.
A number of other dehydrated meals work just fine prepared with cold water if you soak them several hours. Of course this means carrying the extra water the last few hours of the day. You'll obviously want to experiment at home to find out what tastes good when prepared this way and what doesn't. I suspect that a dish depending heavily on melted cheese might not be a good candidate, but, as usual, YMMV.
I'm following Balls' and Sunshine's journal of their CDT hike. They were so excited to start that they forgot to buy fuel when they arrived in New Mexico, so they are using the no-cook method.
In any case, my "cooking" consists only of boiling water, pouring it over my home-dehydrated meal in a plastic freezer bag, stirring and letting it sit in a cozy for 15 minutes. No dishes to wash; just lick the spoon. (Sarah of trailcooking.com is my heroine!) I boil a bit more water than I need and brew a cup of herbal tea to drink while my dinner rehydrates. For breakfast, I eat cold cereal with dehydrated or freeze-dried fruit and dried milk (water added, of course). For "lunch"--actually all-day snacking--it's dried fruit, nuts and cereal bars. My real camp cooking is done at home when I prepare a big one-pot dish, freeze a few one-serving containers to zap for later home meals and dehydrate the rest of it for backpacking meals. I'm going to test these dehydrated meals by soaking small portions in cold water to see how many of them are adaptable to the no-cook situation and how long they take to rehydrat. I probably will never go stoveless, but it would mean carrying a lot less fuel!