You answered your own question with point number 5. If you don’t like the films coming out of a program, why would you want to go there?
From my experience at Tisch, I can tell you that while people can be a bit arrogant, it’s never at your expense. They think that they’re amazing (they probably aren’t), but you’re also amazing and they’re not out to prove that they’re more amazing than you. Almost everybody is very supportive and hardworking.
Also, in film you’ll be meeting people on your own and other peoples’ projects so much that it’s probably easier to develop a social life than in another major where you’d never see people outside of classes.
The NY vs LA thing is an entirely different debate. To me it comes down to the fact that I like indie cinema more than Hollywood cinema. However, when people talk about this, they usually compare NYU to USC, not LMU, which I actually had to Google to know what it was.