I can''t answer why I eat meat, because I don''t, but I can tell you what it''s like to not eat meat. If you don''t want to hear it then just skip to the next reply...
I''ve been a lacto-ovo-vegetarian for over 2 years. That means I eat vegetables as well as dairy and egg. The reason for dairy and egg is because I don''t think I can live without baked stuff like pie and cookies etc.
I''m not sure it is right for everyone, but it was great for me. Ever since I stopped eating meat, I''ve stopped suffering from upper respiratory infections (only 1 cough in 2 years when I used to get one every month or two). My allergies are much better too. I don''t know why. Maybe I was allergic to some kind of additive or maybe the antibiotics or other medication given to animals.
Other''s have had bad experience with iron deficiency when going veg, but I haven''t had a problem with that. I think that problem is more common in women.
As for B12, what I''ve read is that there is an enzyme in meat that destroys the flora in your intestine which naturally produce B12. If you drop your meat consumption but still eat some, you will have less B12, but if you go without meat the flora will return and B12 will come back. I don''t take any B12 suppliments, or any other suppliments for that matter.
Another thing people worry about is getting omega 3 (found in fish oils). If you worry about that, you can get it from flax seed oil suppliments. I don''t bother with it. I tried getting flax seed oil but they package them in gelcaps, which are made from animal bones... go figure!
One thing I''ve noticed is that since I''ve stopped eating meat I''ve switched to more variety in my diet when home and less variety at any given restaurant. There are so many vegetables and so many ways to prepare them that you never get in a rut. I think this variety is good for me. But when going to restaurants, you have less to choose from unless you ask them for something without the meat in it.
An easy way to transition to vegheadedness is to go to the frozen breakfast section at the supermarket. Somewhere near there you will find frozen vegetarian "meat" products, like bocca burgers, chick nuggets, etc. The Morningstar Farms buffalo wings are pretty spicy. The sausage crumbles are great for making breakfast burritos. They also have corn dogs that taste amazingly like corn dogs with meat.
You can get some excellent vegetarian food at Chinese and Mexican restaurants (ask them if they put lard in their refried beans), but the best vegetarian food in my opinion is Indian.
For cheap fast food, try Taco Bell''s 7-layer burrito. Taco Cabana has excellent black bean burrito or soft taco. McDonalds has nothing good to eat. Burger King''s veggie burger tastes like crap.
Last November I was camping and after a few drinks a buddy coaxed me into trying a bite of some steak (they were all talking about how awesome it was)... well I tried it and thought it tasted nasty. But it''s best to be polite with the carnivores, since they are on the "normal" side of things.
As for "political" reasons, I can''t say eating vegetables saves animal lives. I''ve heard more mammals (mostly rodents) are killed while harvesting vegetables (via those massive combines) than are killed in the slaughter house for the same weight of meat. Is this true? I don''t know... it sounds fishy. Also vegetables house a lot of insects and mites and such, but then again meat houses parasites too. You can''t help eat members of the animal kingdom, hell you do that just from breathing dust.
I''m getting a lot less cholesterol than my parents. I''m hoping I don''t have to have coronary bypass like my dad... that was pretty bad.