BLAH people
Here are some types of people just are NOT(as you can see I just learned how to do that, he he he) cool in my book:

people who don't greet you back when you say hello
people who don't signal
people who don't give you the hand wave when you let them in your lane or turn or merge or whatever
people who are too serious about everything
hypocrites
selfish people
people who take out their anger on other people
people who lash out
people who are being selfish but make it seem like they're not
people who are closed or narrow minded

there's probably a lot more...but yeah, that's what I was thinking about right now...grrrrrrrrrrrrrrr