I'm a hand talker too...and also saw them looking at my hands during my interviews, which made me self-concious (thinking it was a distraction for them).
I would try to minimize it and maybe use facial expressions and tone to express your enthusiasm...but at the same time, you have to keep it real, don't fake anything--just try to find a balance.
I know when I was doing mock interviews for engineering jobs, I was told NOT to talk so much with my hands that it is a distraction and most interviewers won't like it.