Why does kevin garnett have to talk trash everytime?

i mean yeah every player talks trash, but not as much and as annoying as him, i mean come on, even when hes injured, he still talks trash on the bench! i mean yeah michael jordan, larry bird, etc. talked a lot of trash, but they had the right to do so, and for the simple fact that they were very well-liked, but kg is different. those faces he makes when the celtics make a shot or play good defense... no comment.. what do you guys think?