I was a vegetarian for a while in high school, and my mom put a (gentle) stop to that, saying that I wasn't going to get enough protein. Ok. It was kind of a teenaged rebellion/sense of identity thing anyway, mom.
In college, I gave it another try, knowing a little bit more about nutrition. But I surely was NOT a healthy specimen, at 60 pounds overweight, because I ate a lot of cheap junk. I was in college, ya know? Oh, the boxes of mac and cheese...
After college, I kept it up until I read a bit more about vegetarianism, and realized, no, I wasn't doing it for any religious reason, or health, or "wanting to know where my food came from," or respect for life. I did it for the sense of identity.
What am I? I'm a vegetarian. I thought that was a very shallow, hanger-on type of reason. So I gave it up.
I could do it again, not vegan, as I like dairy and eggs (love them fresh eggs!), but DH would not go along, as he enjoys meat too much. Sorting out the menu when I went GF was hard enough.