I've tried to stay out of this one but I just want to convey a couple of things.
First of all I'd like to point something out. In real life, communication in real life is not entirely verbal. I think we're all aware of this but I think that it's very important for this fact to be highlighted. A great deal of emotion can be conveyed through expression, body language, and even tone of voice.
Here's an example:
Note the expression on her face as she rolls her head impatiently, blinking a few times in almost disgusted surprise, as if she finds whatever was said by the other person to be almost incredulous in nature.
Wouldn't you say she looks annoyed? Personally I can almost even read her thoughts. "Is this person
serious? Dear god they're an idiot."
A lot of people, I've noticed, are not very thorough when it comes to emoting exactly what expression their character has on their face, or what kind of body language their character is using.
What this thread seems to amount to is splitting hairs over the language and wording used in peoples' emotes.
Let's consider the following two emotes:
1. *Looks at the annoying man*
2. *She turns her head towards the man, rolling her neck a bit impatiently and blinking a few times in a sort of stunned silence, as if she found something he had said or done utterly ridiculous. The look of annoyance would linger on her face for a few moments before she composed herself once more, her features finally softening to a more neutral expression.*
I bet those of you who don't find #1 acceptable think that #2 on the other hand is just fine.
Both of these emotes mean EXACTLY THE SAME THING.

When a person is using such descriptors in their emotes, it' s not because they think your character is annoying in an OOC fashion, which seems to be how some people are taking it.
The only actual gray area that exists is exactly how UNFILTERED your character is when it comes to what they would convey with their body language or facial expression. To use my own as an example, Endelyon is quite practiced at masking her emotions when it comes to terms of diplomacy or debate. She's not going to look at Duke Belt like he's an idiot, even when he's being an idiot. On the other hand, in a more casual or social setting with her friends or among her peers (basically, times she feels at ease) she's likely to remove the filter she has in place, and let her thoughts reach the surface much more easily.
So if Endelyon is saying something that would irritate the crap out of your character, and your character thinks she's being particularly mouthy or petulant (and believe me, she gets that way), go for it! Emote something like *Looks at the bitchy, loud woman* if you want.

If that's the way Endelyon is acting, that's the way I expect her to be treated, and I imagine that it's quite realistic for people to look at her like she's being annoying if she acts annoying. It doesn't mean they think she's annoying in an OOC fashion, or thinks my roleplay is annoying, which seems to be how a lot of people are perceiving it.
Just my two cents. You're all wonderful people and I love you bunches OOC, but just as we have conflict and annoy each other with our opinions in this thread, our characters would have such conflicts as well, and they might not treat each other as respectfully as we do here.

It's realistic, it's fun, and at the end of the day, it's roleplay.
EDIT: Just want to add a "P.S." to my thoughts. Atlas makes a good point that we should all try to work on our sentence structure and conveyance, the more visual descriptors you can add to your writing the better. Really make an attempt to describe how your character is conveying his or her annoyance. It makes you a better writer and better writing makes for a better narrative. HOWEVER, at the end of the day, I think this is more of an ideal we should strive for than a standard that people should be held to. After all, RP happens in English and English is not even everyone's first language.