I'm toying with the idea of going fully or partly vegetarian or vegan. The idea comes up from time to time. On paper, the argument for continuing to eat meat is very weak, and mostly boils down to habit.
If I did it, I'm not sure I'd go as far as refusing meat in a social setting. I think some people use identity as a crutch: If eating meat goes against your self-image, it's easier to abstain from it.
My approach would probably be to file it under the "unhealthy" category.