At this point, I think I'm going to refrain from answering your question directly, but rest assured I'm not ignoring it.
I'm in the interesting (and somewhat surprising) position that my intuitions may have shifted somewhat since last I thought about these matters in depth.
I'm not quite sure what to do about that yet. Either in terms of my general thoughts about how to respond to changes in intuitions, or in terms of how I would update if I decided to run with the new ones. I worry that trying to answer immediately could bias my response towards rationalizing my existing set of beliefs, and I don't want to do that, so I'm going to take some more time to think through things.
I have noticed that among philosophers, vegetarianism of one form or another is quite common. In fact, I became a vegetarian (technically a pescetarian) myself partly out of respect for an undergraduate philosophy professor. I am interested in finding out if there is a similar disproportion in the Less Wrong community.
I didn't request that this go into Yvain's survey because I want more information than just what animal products you do or don't eat; I'd also like to see nuances of the reasons behind your diet. There are a lot more shades than carnivore/vegetarian/vegan - if you want to be a vegetarian but are allergic to soy and gluten, that's a compelling reason to diversify protein sources, for instance. I'd also like to hear about if you avoid any plant foods (if you think they're farmed in a way that's environmentally destructive or that hurts people or if you have warm fuzzy feelings for plants, maybe). Here are some questions that come to mind: