One of these days I should make it a point to get myself the Godfather series and have a look at them. I have only recently watched Christopher Nolan’s Insomnia and found Pacino’s performance so natural and subtle I could have easily believed such a character existed in real life : a fundamentally good cop, treading treacherously in the grey areas of right and wrong and realizing there’s no easy way out once you placed your foot in. The plot was simple and straight forward though not cliche; and it proves even more so that the main character’s performances was riveting enough to keep one’s attention on screen at all times. On a side note, it was interesting to read from imdb that Veteran homicide detective Will Dormer’s last name is a play on the French and Spanish verb dormir, “to sleep”.
Lots of in depth write ups and production notes at the official site : insomnia