I don't understand why Pacino had to get so utterly typecast so that his only notable roles are in mob movies. It's like John Q Public is too dumb to comprehend Pacino playing any other kind of character ever, sigh
Pacino was good in Devil's Advocate, City Hall and Any given Sunday, all of which are good movies, too (in my opinion). And there is Scent of a Woman, you may think of that as you want, it IS a notable non-mob movie with an IMDb score of 8.0.
I hated that Pacino played a flunky. That was painful to watch. Michael Madsen was his boss? I get Madsen has the ability to be a boss, but Al Pacino's? Come on. Forget about it. Pacino in The Godfather, Carlito's Way, Dick Tracy, Heat, etc. That's what I wanna see.
Sigh. In Heat he plays a character that was supposed to have a cocaine habit. This explains half of his outbursts/yelling. The cocaine part was later cut from the script and not shown on screen but Pacino kept on playing his part as intended (he is a method actor after all). The explanation for the other other half of his outbursts: Three times we see him yelling when questioning people: First the snitch Albert Toreno, then Albert's brother Richard (Tone Loc) and finally Alan Marciano (the guy that Chris' wife was cheating on Chris with). This is actually an interrogation technique to throw the suspect off-guard. You can see how effective it is with the latter one, Alan Marciano. Pacino ad-libbed the "great ass" part and the expression on the face of the actor playing Marciano is genuine, he actually forgot his line.
In conclusion: Pacinos performance in HEAT was spot-on and totally in character. I am not a particular Pacino fan but I hate it if people jump on him for yelling too much when in fact almost every time he does so is justified. I cant help but thinking that people love to jump the "Pacino yells too much!"-bandwagon because it makes them feel like being mini-Roger-Eberts.