Im not a Republican. If you were to count the issues, I probably have more issues that I agree with Democrats on, its just the ones that are more important to me Im typically leaning Republican. But I am not registered, and I vote for Democrats at the state/local level about 50/50, but I have yet to vote D for a presidential race.
Anyway, here are some things where I dont just disagree with the R, but I agree with the D.
Gay marriage, pro choice, drug prohibition, a womans body has rape defense systems, government shouldn't have debt, how they interpret freedom of religion to mean make kids pray before class, and I cant remember right now.
Gun rights, small business friendly policy, and a general denial of socialist polocies are why I usually chose R over D, but I got some D in me.