I am strongly anti-abortion, and Obama has consistently voted against restrictions on abortion. (Let's not go down that particular rabbit hole in hesperornis's journal?)

I support the right of adult Americans with no felony convictions or mental health problems to have firearms at home to defend their homes and to carry concealed firearm to defend themselves; Obama doesn't.

There are other small things that I disagree with (his position on nuclear power, his vote for reauthorization of the Patriot Act...), which confirm my decision to not want Obama elected, but they're not as important as those two, as to me they seem like issues of protecting the weak from the strong.

Of course, Obama's opponent is likely to do nothing more than preserve the status quo at best...