A friend of mine was vegan for a while, and ended up not really being able to eat much. No eggs, dairy, meat, fish, those were the basics. Then it got complicated with things like no honey, refined sugar (refined in animal bone char), gelatin and the like, really doing his homework on things. You wouldn't believe the things that contain animals or animal products in foods you thought were animal-free.
But either way, that doesn't stop me from enjoying a good old bacon cheeseburger or a turducken.