I learned a style, influenced heavily by the 'mentors' that I looked up to in RP as I started out my RP 'career' to be something of the following:
On pose pace -
This depends heavily on the complexity and pace of the scene. A lazy, daytime (while people are working) social bar scene doesn't really demand a fast pace. A gunfight with seven players, however, should. In large scenes with more than 3 characters (including NPCs if they are being posed separately), I adopt the 3-pose rule. After three poses by anyone else, it is acceptable for me to jump in with my next. In scenes where there are fragmented mini-scenes (think huge public events with knots of people NOT at Places), I only consider my 'group' within the larger scene for pose pace. To me, this is normally the guiding, deciding factor on how well a scene is going (unless there are RL interruptions). The more interested people are, generally, the more they are engaged with the pace, I have found.
On pose length:
I intentionally try to prioritize pace over length in most scenes, out of courtesy. However, with that said, I generally pose an entire paragraph of several 80-character lines, or sometimes two. Scene sets can be almost a screen full, especially if sandboxed or setting up a new plot, whathaveyou. In faster scenes, with faster action, I will cut this way back to keep the frenetic pace up. Sometimes down to two lines. I will intentionally break poses up if there is a point in my pose that someone should get a decision or action or a chance to pose a response, with the second half of my pose ready to go based on their decision. This is rare, but it has been met with smiles and thank-yous, in the past.
I have found that I can have several lines or just a few. There are times when the latter is more impactful and character-meaningful. It is the mic drop of posing, the silent stare and walking out after a confrontation and saying your piece. Sometimes it works to make your point more fully than a two paragraph pose can.
On content -
I have played with all kinds of personalities. Some that abhor any sort of non-visible/non-detectable elements of the pose transmitting OOC information (such as character thought, intention or whatever). Others actually will embrace that style of posing, as they find (and I admit it swayed me when I loosened up about it) that it can save a lot of misinterpretation (the idea being to 'translate' a bunch of real-world body language, inflection, etc into a text medium in a clear and concise manner). Sometimes this makes great sense, and is done very intentionally. When done right, it changed my RP style to include it. I now feel that this is more 'cooperative' RP to give people hints into motivation, intention and perhaps reactions.
Of course, this is a balance. It can be done wrongly, so very easily. I don't agree that including thoughts is a good example of this. But including things that can be inferred from facial expression, body language, etc, are.
Finally, my thoughts on clarity -
I don't go into huge detail unless I find that it is warranted, that the object or action of detail is the crux of the pose. If I am swinging a punch at someone's jaw, I am not going to go on for two sentences about how my glove is custom-tailored and lined in gold thread. I am going to wax poetic about the swing itself, the power behind it, yada yada yada. I, personally, find that when people expound on several things in a pose, granting heavy detail to multiple points of interest, that I can lose the grip on what they are trying to say.
To me, a pose should have a thesis, not four. It should have a central point that it is trying to make to those in the scene, maybe with a few supporting emotions, quips or minor actions.
Oh, and posing five different comments to five different people in a scene "just to keep up", to me, is scene overload. It happens to me in RL, if multiple people are talking to me directly (versus having a group conversation). I tend to answer in turn, and I do this in my poses. I find that it is much more realistic and manageable for me.