Well, when I referee this is what I strive to maintain:
Mental state: "Zoned out" in a meditative sort of way. Zen type stuff. I find that I can see more this way, and keeping 100% free of emotion helps highest level of consistency, day in day out, in sickness and in health....
Procedural/technical matters: Customer service oriented and "official-like." That's where the "mechanical" responses of "this is a recording" style comes from. Ensures that every bout I process meets a standard of care as set forth by the industry regulations per FOC guidelines and training.
Physical state: "Domo arigato, Mr. Roboto....." Standard refereeing posture and hand signals geared for optimal energy conservation and mechanical efficiency.
These factors combined tend to produce the characteristics that earned me my reputation, for better or worse. Between my attempt to push it to the extreme, and sheer frequency of repetition in practice, it's kinda hard to imagine a noticeable deviance from the usual pattern in my service these days.
Basically the way you see me ref in New England in any random day is going to be the same way I will ref in, say, Indiana, or Alaska.... with some customized variance depending on needs/requests of the clients. (i.e. there's a client who specifically requests that referees don't wear suit and tie)