I don't think I'm that gesture-enabled as a rule (and thanks for making me uncomfortable at work today, since I was self-consciously observing myself). But I find I'll do what it takes to communicate with the people around me.
This is a weird analogy, but I realized after explaining a technical design to a coworker today that the end visible result was just squiggles with a few words on a white board. It was much like my Pictionary drawings (Remember that game? Yes, I'm over 40. Thanks for pointing that out.) I remember playing with an artist friend of mine. He was actually far slower than I was, because he would be representational and would start drawing in a way that made for a good final result. I would draw a mess, but in a way that communicated what I was drawing as I was doing it. In a way, those drawings are just gestures captured in ink.
I think I tend to gesture and be animated when it seems to communicate to the other person, but otherwise I'm fairly still and minimal. I think I also tend to mimic the style of the person I'm communicating with to some degree, but only in the moment.
Sorry to be a little long-winded, but that's the price you pay for making me awkward because I'm observing myself at work.
I use a ton of gestures when I talk. I believe it is because I am such a visual person and me expressing my ideas with my hands can help me see what I am talking about. Strangely, it makes me feel like I'm helping the other person understand what I am talking about by painting a picture for them with my hands.
Yup, yup. I feel that my hands are an extension of my voice. I need them to emphasize my point. Also, I have this weird desire to scribble when I talk too, to scribble down all kinds of words, adjectives, that comes to mind. It is easier for me to keep track of what I am saying.