I was strongly leaning toward voting for Clinton because she was a woman. For some people, the thing they feel most strongly about is seeing certain groups represented in high levels of government. That's the issue that drives them. So, I don't see a vote for someone b/c they are a particular race as racist unless that person is absurdly unqualified and IMO, Obama does not fall into this category.
Now, I don't know if I could have ultimately gone through with it. I imagine that over the course of the campaign I would have resumed being more concerned with matters other than gender parity but for a moment I did understand how a person could vote for a person b/c of an immutable characteristic and do so in good conscience.