A lot of what has been posted here bothers the shit out of me (except tummy, I think it's a cute word). To hopefully avoid repeating what's been said, I'll add a few of my own.

1. Time. People that are chronically late. I have a few people in my life like this and I've got to the point where I tell them to be somewhere an hour before they really need to be in hopes they will be on time. 

2. Social events. If you're going to invite someone do it right. Call or send an invite at least a week ahead of time, including place, date, time. Don't fucking call me the day before and say oh around noon? Like you're not even sure yourself. It makes me feel like you don't really want me there and then I have to drop everything to try and make it. FUCK YOUR BAD PLANNING. 

3. Littering. How lazy does someone have to be to just throw their trash out, I mean really. It's disgusting that when someone leaves their half eaten fast food or their kid's dirty ass diaper laying on the parking lot. Then you have those special human cysts that miss the trash can and don't bother to pick their shit back up and put it in the can. Or the ones that dump soda all over the parking lot, that shit gets really sticky and nasty. 

4. Bathrooms. Don't get me started about how people behave in public restrooms. I just can't. Oh, my blood pressure.