That always seem to need to say the last word in any situation?
Whether if it's in a meeting or a phone call.
That's one of my most biggest pet peeves. I have co-workers who literally will talk or shout over the speaker just so they get their point across. Every time I see that, I just want to throw some baseballs at their faces. For chrissakes man! There's effing etiquette behind having a conversation.
Also, another crap that is annoying is when people want you to pronounce their full name. Let's say your name is.. oh I don't know, Maximilian. We all know it's a long name. Not only that, it's annoying. IF I had a name like Maximilian, I would hate to be called that. I'd freaking shorten it. Like.. oh I don't know. MAX seems like a good short name. IT still gets the point across.
I have a co-worker that will literally correct you that his name is Maximilian and will get royally pissed if you call him Max. Isn't it usually the other way around?!