I have also never seen Gone with the Wind. Another big one I've somehow managed to put off is the Godfather Part II, but I intend to watch it eventually since I do love the first one.
Oh God. I am jealous that you took this long to wait to watch the Godfather Part II. You had better get busy and watch it, because you need to spend the rest of your life re-watching all of them. They are all SO freaking good and the best part is that the whole scenario changes every time you add a new movie to the mix.