These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Complete Monster: Waingro. Murders unarmed guards who he thinks looked at him funny, as well as rapes and kills multiple prostitutes. His final horrid act is to murder Danny Trejo's girlfriend and beat Trejo half to death, but not kill him because that would be a Mercy Kill. This all shows you how much better Neil Mccauley is, even if he is a thief himself.
Draco in Leather Pants - Neil has quite the following despite being ultimately a bank robber, murderer, and all-around bad guy. This was probably at least partially intentional, though, given the amount of Character Development he gets.
Harsher in Hindsight: The film is known for the climatic bank robbery scene, where Neil and his gang get into a gunfight with the police and shoot up Downtown LA with automatic rifles. However, this film came out two years before the infamous North Hollywood Shootout.
The robbers of the North Hollywood Shootout reportedly watched this film numerous times.
Funny Moments: Hanna gets a couple; his interrogation of Hank Azaria's character and his reaction to Ralph.
Moment Of Awesome: The coffee scene is one of the most memorable scenes in cinematic history. The bank robbery scene, and the shootout that follows, is also a contender for the best robbery ever put on film.
Moral Event Horizon: The audience already knows that Waingro is an unstable and violent character after he shoots the first guard during the armored car robbery at point-blank range for no good reason, but the scene where he kills the prostitute, then the scene where Hanna visits the crime scene of another one of Waingro's victims, exists solely to push him into this in order to demonstrate how Neil and his friends, while still violent criminals, are much better people than him, even though Neil and his crew members use assault rifles during the bank robbery shootout and bring down several cops, and kill at least one detective.
One-Scene Wonder: Unusually, it's a one scene pairing. The two lead characters spend the whole movie plotting against one another, but never meet and aren't on screen together except for one great scene where they sit down and have coffee (see Not So Different) and the final showdown. Notable, because it's the first time Pacino and De Niro ever did a scene together.
So Cool It's Awesome: Even disregarding the fact that it puts two of the greatest actors in cinematic history onscreen together, it's generally regarded as one of the best cops and robbers movies ever.
Tear Jerker: Charlene, without a word, warning Chris to stay away, and in essence saying goodbye to him forever.
Also, Neil abandoning Eady when he sees Vincent coming after him.