It's the subtle touches that make this game great.
I pulled in front of a tractor trailer on a busy street, blocking his path. I watched as the driver physically honked his horn, then started freaking out in the cab, throwing his hands up and gesturing wildly. I jumped out of my car, and as I was making my way to his door, he flipped me off. When he realized that I was coming for him, he launched himself out the passenger side door and took off running. Brilliant.
The first time I started a street rampage, I sucker punched an old woman in the back of the head. A young guy witnessed the crime and started sprinting away. I ran after him, and as I gained ground, he took out his phone, and (while running) yelled "Hello? Police? Yes! I just saw a woman get attacked..." and just as he was about to finish his sentence, I stabbed him.
I love the police AI too. They're damn smart and almost seem to anticipate your next move.
Everything about this game is stunning. The uncanny valley is very near. If this is what current-gen consoles are capable of, what lies ahead for PS4 and XBone?