I hate people who can't walk correctly. It frustrates me when people are oblivious to the fact that they're in people's ways (like standing in front of a doorway for example). Other examples would be 3-4 people walking side by side on a sidewalk or in a hallway and won't let people walking in the other direction through OR they won't let faster walkers coming from behind pass them.
Also, I'm a vegetarian and eat mostly vegan. I hate when people ask me how I get my protein, B12, etc. I'm a fairly big kid, and more muscular than most people who ask me these questions. I eat extremely healthy and people observe that, but they still ask stupid questions about vegetarianism and sometimes debate that I am unhealthy. Ugh...
This post just makes me think of everything that angers me. I get angry with lots of people because it seems like nobody likes to think about anything...ever.