I think the movie is a classic because it has great suspense and mystery which keeps the views captivated throughout the movie. Not only are there two men vying for the same woman's love in a love triangle, there are also many wartime conflicts that many people from that time period could relate to.
All the characters made the movie humorous and dramatic, the dialouge is very clever. The character that stood out to me the most was Rick. His whit was unbelievable and he seemed very ignorant and selfish, but in the end we see that he is very caring and only wanted the best for Lisa.