Well, this is a 'nice' thread.
I actually like to talk to my horses, particularly if my husband is having a moment of selective hearing.
I use a lot of verbal commands, a lot of hand signals, a lot of body language, along with the standard whip, rein, leg and seat aids. I'm usually dealing with exceptionally intelligent individuals who are now self-aware. This makes for an entirely different equine. One where the fight response has become far more prevalent than their flight response. So, a lot of times these individuals simply don't respond to what your average horse responds to, or they don't respond how the average horse would respond. I've had to come up with different approaches.
I think we all use what we're most comfortable with and what suits our personalities and needs. And I think we do best with horses that fit those personalities and needs. Some horses require more. Some would like to be left alone.
It's an indication of your knowledge and experience (and age
) that you know what you what and know how to convey that to the horse.