Wash and Zoe.

No, I'm not saying this because I'm a 'Firefly' geek. I'm saying it because I felt they had the most realistic marriage I've seen portrayed on TV. They weren't over-the-top lovey-dovey, but nor were they constantly sniping at each other. Theirs was neither a sitcom marriage nor a soap opera one. Instead, they were a couple who showed love and affection, and obviously - gasp! - still loved each other after more than one year of marriage. And yes, they fought, but it was realistic and not overdone.

OK, maybe it's a little bit because I'm a 'Firefly' geek.