There's a reason this is one of the most popular action films of all time The reason why this is one of the most popular action movies of all time is because it is one of the best. Not only that, but the movie has cross-over appeal. The movie makes most action lovers top films lists, and even many people who aren't big action movie fans like it.
The acting is top notch for the genre. Bruce Willis plays the part of badass cop John McClane perfectly. Although there are literally millions of gunshots in this movie, Willis is forced to use his brain just as much as, if not more, than he uses his gun here. The terrorists are played very well, too, led by Alan Rickman, who was perfect for the part of Hans Gruber.
All of the action scenes are well handled. There are moments of drama and humor in the film as well, and they are placed perfectly. All the parts fall into place very well.
If you haven't seen this movie, I recommend you see it as soon as possible. It is easily one of the best action movies of all time.