deadsticky
I guess it depends on what you call loud and fast but miltary radio calls tend to be 'crisp' and to the point and given I live in an area where my airspace is often occupied by expensive pieces of her maj's flying metal work using my barn as a target I wouldn't dare to suggest that their drivers sound like prats.
Correct calls are better than incorrect ones but an incorrect call which still makes clear the intent is better than an incomplete call.
If someone has called downwind at a variable direction circuit airfield I would quite like to know whether they are in the right hand or left hand circuit before meeting them head on in the opposite direction base leg before a slightly late final turn.
Similarly where the wind is across and either end of the runway is suitable I would like to know which of the opposite direction runways an aircraft on final is using than just the information that he is on final.
At many airfields none of the above is likely to be a problem but at some smaller strips it could easilly be. At busy airfields I always find ATC far more helpful if they get the required information (and no more) in as clear and fast a way as possible. In the early days of my flying it was noticeable how as my radio calls became more succinct I received fewer instructions to 'remain outside controlled airspace' when wanting to transit through busy zones.
Clear and fast with emphasis on the important and relevant information for the intent of the call is not for the purposes of posing but to help me do what I want.