So many musicals to choose from, it is definitely a hard decision to say I have just one because I love re-watching so many! "The Wizard of Oz" - hands down, is my very favorite, but it is such a classic that, dare I say, it is almost overdone? It is shown yearly, sometimes multiple times a year, has dozens of remakes, is engrained in our culture, and even immortalized at the Smithsonian. And truthfully, could you have assembled a better cast? Timeless.