I might be in the minority here. I really don't mind most of the MH flavors, and the two person meal is good enough for two of us. We do supplement dinner with a little trail mix, jerky, or energy bar.
For some reason, I seem to eat more when I'm NOT hiking. Why? Probably availability and boredom. Normally I bring 1.3 PPDPP, which is plenty for my 8 miles per day average.
I'm 165 lbs and 5' 11", and eat very healthy regularly, so I'm not so terribly opposed to eating the relatively unhealthy MH stuff when hiking. Now, if I were out much more than I am, I would certainly be a bit more conscious of what I eat. In fact, I've recently gone to eating this:
which is basically a "beefed up" version of regular ramen. Its about $0.70 a meal, weighs 4 oz dry, and many varieties have a crap-load of calories--some of them have more calories than MH meals.
Ya, I know some of you gasp in horror for both nutritional and taste reasons, but it works for me.