You mentioned four gagnster films. ALL better then Scarface, yes Goodfellas too. Fan base? A fan base does not count at all. LOTR has a huge fan base, does that mean I have to bow down to it? Pacino's favorite movie of his? Irrelevant. Just because it's Pacino's favorite doesn't mean it's the best.

Scarface is a simple plot Rise and fall. The Godfather, and Goodfellas had much more realistic plots with a much better direction then Scarface had. Most people just say it is because they are fanatics over the entertainment of the movie.