Here's a couple of things I can do without:
1. People who think they are being high-larious when they refer to celebrities they don't like by using Cracked-Magazine-level puns on their names, like "Shitney" for Britney or "Christina Skankulera" or "Ben Affuck". I have zero interest in defending the famous and marginally talented, but come on, people. This just isn't funny.
2. Aging hipsters who brag about how uncool they are, and how they only listen to music from their heyday. As an aging hipster myself, I certainly (wrongly) look upon the mid- and late-'80s as a heyday for music, and play my Minutemen records quite a lot, but there's no reason to be PROUD of giving up any attempt at curiosity for the world around you. Boasting that you're a 40-year-old "uncool" guy who only listens to stuff that sounds exactly like what you expect is nothing more glorious than an admission of defeat. If you don't want to try and stay cognizant of your culture, that's fine. It's tough, frustrating work. But don't brag about it.
3. People who think their opinions are objectively better than other people's. For that matter, people who use the word "objective" and "opinion" in the same sentence without the words "is not" linking them. I, naturally, think I am right about everything and everyone who disagrees with me is wrong. Everyone does. But let's not flatter ourselves that we're universally correct, hmmm? Objective truth belongs only to God, and since God doesn't exist, you can see where that leaves us.