West Side Story...hands down! It's a classic that never grows old!
The brilliant and intense Bernstein musical score, the beautifully-choreographed dancing, the wonderful cast and acting (except for Beymer), the beautifully designed scenery, the great cinematography and costumes, and the very story behind West Side Story are combined into a dynamic little package that makes this great movie/musical classic a movie that's so great that I could watch it over and over and over again, and never get tired of it.
As a devout fan of the film West Side Story who has attended virtually every screening of this classic in our area, has seen several stage productions of WSS, including the newer, more up to date Broadway stage revival (which I was more critical of), and, believe it or not, has even made several special road trips into neighboring states to see this film, I say that the next time a screening of WSS comes to a movie theatre in your area...jump at the opportunity to see it. It's an enriching, unforgettable experience, whether one's seen it before or not.
The MGM quotation "Unlike other classics, West Side Story grows younger" is so true!