I don't have time to read the other arguments (maybe another time) but i have been a vegetarian for 16 years (since i was 8, long story, my own choice).
I think it's pretty fucked personally, that said, its not like i'll judge other people for it. Even moreso, i want people to be vegetarians because they believe in a set of ethical views, rather than them just being badgered into it by me. It reminds me this story of this couple being two different religions. To make the girl happy, the guy would convert but if you think about it, that's almost an insulting thing to do. You want a person to believe in something because they actually do think its the right thing.
Here are some basic facts. We don't need meat to survive, it is essentially a nice thing to have. Production of meat, especially modern agriculture, can and very often does, cause a great degree of pain, discomfort and stress to the animals. Thus, we are basically causing a large degree of pain and suffering to other sentient creatures over a luxury we want, rather than something we even need, i do find that a little fucked.
I think philosophically and ethically (but even just on a common level) people will have a hard time truly justifying causing suffering to another being because it gives them something they like, rather than something they need. Say if i went around stabbing peoples cats or dogs because i liked it, rather than necessarily out of self defense (or starvation), most people would be rather disgusted. The industrialised nature of modern agriculture, like many other cruel things in our world, puts us at an arms length so comfortable that we often forget where it really comes from and how.
However, its like many things in life. Most people either don't think about it all that often or all that deeply OR they just dont really care. I do a lot of bad things i don't think about all that often but in a perfectly moral world i should care about and take action on. I'm pretty sure most of my clothes were made in a Bangladeshi sweat-shop. These electronics probably contain a lot of misery too. That said, i suppose its a bit easier to minimise meat consumption than it is electronics or clothes.