Nothing annoys me more than:
Coach driver blasting out music on his/her radio on a long commute.
People talking loudly on their phone. Am I wrong to suggest that certain nationalities do tend to have a very loud speaking voice which makes it worse.
People not using the mute on their calls so that we all get to hear both sides of the drama.
People, young studenty types usually, but not always, who speak with American intonations. Replete with rising question tag ends interspersed with a million likes as in 'I saw him, like, yesterday? And like I'm like tired of him?
People who smell. Jeessus! Where's the bucket?
People who drink alcohol on trains.