tcannizzo wrote"My time" is not annoying to me because to me it means that the umpire is calling time without the request from either the offense or the defense. I am not saying that I call it that way, but it is reasonable to eliminate the need to explain which team is being charged a conference. I'd file it under preventive umpiring. Is it necessary? No.
I actually go a step further here and file it as going well beyond preventative umpiring. If I'm calling time, it's always for a valid reason - I'm either calling it by rule, mechanic, by request, or I'm calling it because conditions justify calling time (which is, again, supported by rule).
If a coach believes I'm going to call time just to screw them out of a charged conference, they need their head checked, and putting the word "my" in front of "time" isn't going to get them a better grip upon reality.