I can only speak for myself. I don't eat dog/monkey i think it because my upbringing/culture thus it create disgusting feeling in my brain.

I have no problem with pigs because I've used to it since childhood and i find it delicious. It has nothing to do with it being intelligent/emotional.

I find it hypocritical too, but there are some animals that also just don't taste that great compared to what is "common". Whale meat for instance resembles beef, in kind of the way alligator resembles chicken. But whale and gator are pretty terrible in comparison to the more common animal so they just aren't worth it to eat.