Yay, my first poll is so popular!
Any-who, I guess I'll weigh in.
I can see why the Civil Union compromise is sought after in the SSM debate. It satisfies two main points. Gay couples are given the federal benefits and legal recognition as marriage, but the actual term is reserved for the union between one man and one women.
However, this fails due to one simple fact: Having two federally recognized institutions to serve the exact same purpose is perpetrating a separate but equal mindset. Brown vs Board of Education revealed that separate but equal is unconstitutional.