My local AMC theater was showing a 50th anniversary screening of The Godfather; I had never need it, believe it or not - only parts of it.
First of all -- I wish there were an intermission! Movies that are 3 hours should always have an intermission! It used to be a standard thing in the 1950s and 1960s; what happened in the 70s? Sigh.
But, the movie was good, and emphasizes "family loyalty" in organized crime family. Al Pacino never wanted to be in the family business, but he is drawn in to protect his father at the hospital. His first murder at the restaurant is very suspenseful and dark. It 'feels like this character is being born' says Deep Focus Lens in the video review (see below).
I need to see Part II and Part III to fully experience the full Saga. I remember when Part III came out but just wasn't interested in it or Part II enough. What bothers me in the film is the racism of the characters; several uses of racial slurs are used and makes these characters very unsympathetic to me.
But Al Pacino's character is really the focus of the saga. See Siskel and Ebert's review below in honor of the 25th Anniversary. Siskel says the sequence where Al Pacino hides out in Sicily is something that was never seen in a mob film before. I liked this sequence and I think it is my favorite in the film.
Vlog review of The Godfather by Deep Focus Lens which covers earlier gangster films and how they compare with this film, as well as how it inspires later Italian gangster films like The Sopranos later on.
The trailer for the 50th anniversary show is really cool.
Siskel and Ebert review (1990s)