I see nothing wrong with the choice to be a vegetarian, however, with the following caveat.

Vegetarians (and vegans among them) who tout that their diet is somehow more superior or that meat-eaters are unwholesome people or otherwise just plain "wrong" need to take a good long look at biology. Humans are, scientifically speaking, omnivores. Yes, we have teeth designed for the consumption of plant matter - but don't let that blind you by overlooking that we also possess canines and other teeth designed for tearing apart animal flesh. We're not herbivores. We're not carnivores. We are omnivores. You cannot contest against this. You cannot say this isn't true. To do so would be tantamount to denying gravity or that the Earth revolves around the Sun.

Humans can, and many do, subsist off meat-free diets, but not all humans have the same metabolism. One man's cure is another man's poison. While eating vegetarian may work OK for you, it could be disastrous in other people. Moreover, humans would never have evolved into the great thinkers we are today had they not included meat into their diet at some point throughout the millenia. Indeed, it wasn't until man (or pre-man we might say) began consuming meat that they spread out across the globe. As strange as it may sound, we are the creatures we've become today because of meat consumption.

So if you choose not to eat meat, excellent. I do sincerely applaud you for your taking a stand against factory-bred anmals - because it really is a disgusting state of affairs how animals are treated in the world of slaughterhouses and factories, etc. But be very wary of what arguments you throw out at meat-eaters, because most of them are just plain wrong.