Vegetarian

Famous Vegetarian : Albert Einstein, Brad Pitt, Pope, Michael J Fox, Albert Schweitzer, Sir Isaac Newton, Leonardo Da Vinci, Pythagorus, Sir Isaac Pitman, Leonard Cohen, The beatles.

Humans

Human characteristics are in every way like the fruit eaters, very similar to the grass- eater, and very unlike the meat eaters.The human digestive system, tooth and jaw structure, and bodily functions are completely different from carnivorous animals. As in the case of the anthropoid ape, the human digestive system is twelve times the length of the body; our skin has millions of tiny pores to evaporate water and cool the body by sweating; we drink water by suction like all other vegetarian animals; our tooth and jaw structure is vegetarian; and our saliva is alkaline and contains ptyalin for predigestion of grains. Human beings clearly are not carnivores by physiology -- our anatomy and digestive system show that we must have evolved for millions of years living on fruits, nuts, grains, and vegetables.

Furthermore, it is obvious that our natural instincts are non-carnivorous. Most people have other people kill their meat for them and would be sickened if they had to do the killing themselves. Instead of eating raw meat as all flesh-eating animals do, humans boil, bake, or fry it and disguise it with all kinds of sauces and spices so that it bears no resemblance to its raw state. One scientist explains it this way: "A cat will salivate with hungry desire at the smell of a piece of raw flesh but not at all at the smell of fruit. If man could delight in pouncing upon a bird, tear its still-living limbs apart with his teeth, and suck the warm blood, one might conclude that nature provided him with meat-eating instinct. On the other hand, a bunch of luscious grapes makes his mouth water, and even in the absence of hunger he will eat fruit because it tastes so good."

Scientists and naturalists, including the great Charles Darwin who gave the theory of evolution, agree that early humans were fruit and vegetable eaters and that throughout history our anatomy has not changed. The great Swedish scientist von Linné states: "Man's structure, external and internal, compared with that of the other animals, shows that fruit and succulent vegetables constitute his natural food."

This source is very useful when I found it through the internet. (website below)
You can read through them thus understanding the different types of vegetarian.

I, myself belong to type 1, 2, 3 and 4.
the 3rd and 4th isn't of much difference.
What about you? :)

Different Types of Vegetarians

They consume no animal flesh and avoid all foods of animal origin. They consume no animal flesh but include dairy products in their diets. They consume no animal flesh but include eggs in their diets. They consume no animal flesh but include dairy products & eggs in their diets. They include fish, eggs, and dairy products in their diets. Please Note: Due to all the negative responses we receive by listing Pesco, we would like to express our feelings. We do not consider Pesco as a true vegetarian, as they still are consuming flesh, but we feel they are on the right path to becoming a true vegetarian all they have to do is just give it a little more thought.

Adapted from: http://www.jtcwd.com/vegie/famous.html