I work with an extremely loud individual who injects him/herself into every conversation. Everything about this person is loud. This person almost always interrupts other's conversations. I'll often have someone come over to my work area and we'll be discussing work or personal matters and this person has to chime in. Literally pop up out of his/her chair and talk loud and chime in. Drives me friggin' crazy. This person is a nice person and isn't a jerk/witch, but man, I go crazy sometimes. I'll talk to the person working next to me and "bam", this person is talking too. I'll be working on something privately at my desk - even on a phone call - when this person interrupts to add something to what I'm saying. It isn't all the time and some days I can deal with it, but there are times that if I had one of those inflatable mallets or bats I'd use it on this person's head! Like others have already said, we all have our quirks and Lord knows I do things that drive others mad too. It's hard sometimes, but really, what we should be doing is talking to people and explaining how we feel (at least that's what I'm told by HR), but it's more fun to enroll people into our bantering I guess.