My thoughts on this topic can be summed up by "Yes." There are many ways to form families, and if people want to get married--go for it. Consenting adults are consenting adults.
Just as I don't feel it's appropriate for society at large to tell me that I don't deserve to have my original birth certificate, I don't feel it's appropriate to tell people they cannot marry, based on their sexual orientation.
I do live in the San Francisco Bay Area, drink lattes, and read The New York Times.
I remember a time when I did not, and when I had some serious homophobia to battle within myself. I am thankful for the patience and guidance of my friends, gay and otherwise, in my steps along that hard route.