Hey great thread! I stopped eating red and white meat about a year and a half ago because of ethical reasons and became a pescetarian. Two months ago I've stopped eating all seafood and am on a strict vegetarian (lacto-ovo) diet and loving it!
You have to be so careful though when buying food. I still eat cheese but have to make sure it doesn't have animal derived rennet in it. Also I have to watch out for gelatine as well as it's a byproduct of slaughtered animals.
I get a bit annoyed with some people though. The other day I was going to a family dinner and reminded them I'm vegetarian and was told 'that's ok we have chicken'.

Some people seem to think that chicken grows on trees!
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