I've always been fairly picky when it comes to the anime that I choose to watch. I have just had too many situations where I was uncomfortably surprised with an anime that I really didn't want to watch. This is particularly the case with anime that deals in horror elements, as I am a chickenshit coward when it comes to anything remotely scary, and Japanese anime can be very scary to me.
To avoid getting caught unaware, I often have to rely on the openings of the show in order to give me a good sense of the show's general nature and outlook. This has resulted in me oftentimes finding the openings of anime almost as entertaining as the show itself. Thus the reason for this particular countdown.
This will not be some exhaustive list of the greatest anime openings, but rather an opportunity for me to talk about some amazing anime openings and hopefully inspire you to check out some amazing anime if you haven't already.