Yes, I recommend reading the thread that Kat Lady pointed out that we had a while back, as many views on this topic were already posted there. I am veggie, as I believe it is the ethical choice, for these reasons:
a) less land use to raise plants than to raise animals
b) inhumane factory farms (and that is where most meat, at least in this country, comes from nowadays)
c) less killing overall, as you are killing less plants to get one vegetarian meal than the amount of plants that go into creating one meat meal
d) less water use raising plants and not animals
e) health reasons (think heart health, cancer, obesity rates, etc)
f) the pollution from factory farms is horrible too (think water and ground pollution from the huge concentrated amounts of manure (they actually have a term for the pits where it all gets dumped but I can't think of it right now) and mass methane creation from cattle farms)
However I accept that not everyone is going to agree with me, or they have different needs/priorities, etc., so I don't try and convert other people. For example, my best friend is such a carnivore that we probably balance each other out in the end, but she doesn't try and shove a burger down my throat and I don't try and shove tofu down hers, and we're good. :D I am actually the only vegetarian I know in person so I'm used to being the freak in this regard.
And speaking of dietary needs, I often wish I could go vegan, but for me this isn't very feasible... I have seriously cut down on my dairy and egg consumption, however I don't think I could ever completely give them up as I am hypoglycemic and when I need to eat, I need to eat, and if I need protein instead of carbs (or the reverse, for that matter) to balance out my blood sugar than I have to eat it soon or else I'm a roller coaster mess, and frankly, in most places it's not easy to find a vegan meal that meets my instantaneous blood sugar needs (depending on what I need right then). So if I'm at home and I'm baking a cake, yes, I can use the soy milk and the egg replacer mix; but if I'm out running errands and I need some protein or I'll turn into crazy sugar crashing lady, I will grab a slice of cheese something or other. So I completely understand that some people's dietary needs dictate the type of food they eat. Even Ingrid Newkirk, the head of PETA, has to take beef-based insulin for her diabetes, as the synthetic version didn't work for her and she had no option if she wanted to keep her health up.
Anyway, it is a personal choice but I've never been one for shoving your causes down other people's throats. Debate like this is good because it helps people see other points of view, and may also give information to people that are trying to still make a choice about it, but saying that "my way is better" about anything I think is pretty presumptious. My ethics are not your ethics and yours are not mine (nor are our needs the same). Also, if someone goes veggie due to "peer pressure," I don't think it will stick, as you have to want to make a major change like that for YOURSELF, imho. People often resent being forced into certain positions, and end up going in the complete opposite direction out of rebellion. So guilting someone into giving up their beloved steak isn't doing them or your cause (vegetarianism) any good, again imho. ^_^ Definately if someone says, "I'm interested in going veggie, can you tell me about it/give me suggestions?" I'm all for it but trying to convince someone who doesn't want to go veggie I think is a waste of energy.
Anyway, once again just my two cents on the matter.