But if the argument is for the reasons you list (iron, etc.) really what you should eat is probably the liver. Who wants to serve some up?
In the last 23 years I have eaten meat perhaps five times. Only when overseas and eating what I was served, and wishing to learn more about the culture. I have tried eating a vegan diet, for several weeks at a time, but I never really got very far. I found myself having a very hard time balancing meals throughout the day to keep my energy going, when I eat a lot of soy it tends to go through me, and I don't like taking a lot of supplements.
I also have a theory that I have concluded to be absolutely true and scientifically proven, simply by using my taste buds: Man cannot live without pizza.
(And I mean real pizza with real cheese).