Re: This sort of relates. You might find it interesting.
I started following a vegetarian diet in March of last year, lacto-ovo, not a label reader, so pretty lax about it. Before then I was eating meat pretty much daily. Early this year I decided to start eating fish and chicken again. The main reason is that I started having stomach problems that, while probably not directly the result of vegetarianism, were slightly alleviated by occasional meat (although not cured, as is clear from my latest journal posts). My diet was pretty healthy if a little carb-heavy, and while I could try to work around it or consult a nutritionist, I guess I didn't care enough to do that. The reason I gave up meat was to save money and learn to enjoy a wider variety of food, and I did that: before the vegetarian experiment I ate almost no vegetables, and now I eat most of them. (Fruit, though, is still tricky business.) I also eat vegetarian most of the time at home, and no red meat or pork. If it turns out I have bowel disease, I will probably have to eat even more meat and cut down on my beloved carbs, which pains me, but in the end I'm gonna be selfish and put my health first.
The second reason is a little vain, but I also gained 25 pounds over the last year and I think a lot of that had to do with the diet. And believe me I tried SO many different diets (not in the sense of weight loss diets but dietary PLANS) and the weight remained. When I started eating meat again I started to lose. For whatever reason, my body just does not seem to like a vegetarian diet, and while I'm sure there are work-arounds, in the end I have to listen to my body if it's screaming out for something. I just function better when I eat meat.
I also never really saw meat as a non-food. Just "food I don't eat." So I think that's part of why I found it easy to take it back.