The first one you might want to lower your weapon, find a different angle and maybe try a different color. For the second I liked really it. Good use of campaign cut-scenes. And then the third I love the effect, good job there as well. And the fourth HOW COULD YOU KILL PHIL LIKE THAT YOU MONSTER?!
I love the second one, i dont know what it is about it but it just looks amazing, dont realy like decapped but thats just my preference.