Vegetarianism is something that I could never do. Abstaining from eating meat would just ruin my life haha.
I could take meat or leave it. I eat vegetarian when I feel like it. 
I could probably abstain from eating some seafood, but red meat and poultry? No way.
I'd agree with that. I don't really like seafood much. Unless it's lobster, I do like lobster. 
I quite like scallops and shrimp. On another note, vegetarians are that way for many different reasons.