I went from being indifferent to emacs to becoming a hater (just because of the fan club which can get a bit annoying) to actually using emacs and loving it so much that I almost became a part of the same annoying fan club.
There's a certain elegance to emacs that takes a while to get used to but when you do, it just transforms the way you do most things on your computer. Just goes on to show RMS's genius.