I was a former libertarian/Republican turned Green/Independent during my liberal university education, voted Nader in '00 and '04. Never voted for any Democrats for anything that I could recall. I didn't think most of them "got it".
I wanted to see if there were any good Republican candidates because not only were the Democrats that were being talked about initially in the press sounding like complete tools, but I didn't want it to be (some random Democrat) vs. Bush III. Plus I knew when I heard there was a guy named "Barack Obama" running I knew somebody was pulling some shenanigans on that side. So I watched the debates one night, but my roommates were talking over most of it so I didn't hear much. There was one guy I heard talk about economics that I thought made sense, but I didn't remember who he was. A few weeks went by and it was bothering me that I couldn't find which of the Republican candidates I identified with that night at the debate, and finally I came onto Ron Paul doing some research. Watched some of the debate videos including the one of Guillianni and I was pretty much hooked. Wasn't sure about his immigration policy so I e-mailed the campaign and got a very re-assuring response. Wasn't excited about his pro-life policy, but that was never an issue that I voted on if for any reason because it never changed no matter who was in power. In fact, I knew that in '00 when the media announced Bush won and the girls watching the news in the college dorms started almost crying and really freaking out. One of the reasons was because he was pro-life. I actually remember assuring them that it was unfortunate that he won, but that there was no way he was going to do change the country's abortion policy. Accurate prediction on my part.
Anyway, another concern was environment. It didn't take long at all for me to realize that I pretty much agreed with him on everything, and soon discovered that I couldn't really disagree with a word he said about what he would do in federal office.