Will Smith's character is the "Angry Black Man" that we have seen many times before, who is married to a black woman who has to shack up with flyboy while she strips for money to keep her son fed. Jeff Goldblum is the "smart Jewish" guy, and if that didn't hit you over the head, you had his character's father answering every line of dialogue with a question. Bill Pullman as the president had to be the most white bread and mayonnaise actor you could possibly find. Oh, and the best part is when the motherships all start crashing to the ground they show different parts of the world. Everyone has military style weapons... except Africa, who still has natives with shields and spears! As we all know, Africa has plenty of military style weapons. We (the United States) sold them to them!
Oh, and as for the killing of the aliens, it was all the same. Open the hard exterior, shoot the inside. Works for the fighters, the ships, the mothership's computer, and even for the aliens themselves.
I laughed all the way through this movie. It was the best comedy I had seen since "Over the Top."