To be honest I am a complete omnivore with a preference for meat; I am rather curious as to what drives some people to eat vegan though. Personally I have never felt that much compassion for anything dead on my plate other than to hope it died cleanly.
I'm convinced that veganism is unhealthy. Every one I've met has had some kind of health problem, which they have to deal with through some sort of supplement, which means there was something wrong with their diet in the first place. Fruitarians are the freakiest, though. Like, WTH? The next step is to follow the Vulcan example, and just eat one-celled organisms? And the next step after that...to hang upside down on tree limbs for the rest of one's life. But I digress...