Having someone sitting at a table in a restaurant that has a really loud voice! I want to slap them and tell them to shut up...
If they are at my table, I will tell them to talk quietly.
Many could make a long list of things we don't like. But because we've learned to avoid them, most would be so infrequent as to not be worth mentioning as mere hypotheticals. And then there are frequent minor annoyances we cannot avoid that we just need to endure.
Am often on Yahoo a news congregating site, and they seem to forever pummel that site with celebrity bikini links that I never open. Of course, given attitudes of the vast majority of men I understand why they provide those voyeuristic links. Sure, I greatly enjoy looking at live women in person, however not via any type of media.
Drivers that never use turn signals in traffic.
Vehicles without front license plates that is supposedly illegal here in California. Popular with law breakers of course and ignored in some urban counties.
1) Women wearing pants. I don't like it. Dresses and skirts for women.
2) Muslim women wearing headscarves. It makes me sad to think of someone so indoctrinated.
3) Tattoo's. They're very common today, but I maintain a petty "ugh" about them. Especially on women.