I saw it at the uptown here in DC (nice theater) and the thing I remember most is the most obnoxious lady next to us quoting from men in black "I make this look good" every time keanu reaves put on his sunglasses. And she was seriously like shouting and jumping around in her seat at every fight scene. SO ANNOYING that I still remember this 10 years later.
The first movie, awesome, the second and the third... eh.