@tyote Hate to be that guy, but ambidexterity and handedness are matters of degree. I am both right-handed and ambidextrous--my left hand can do anything my right hand can, but the right usually does it better. When I'm using a tool and the focus of work crosses the centerline of my body, I usually pass the tool from hand to hand--I don't reach over. I never even thought that was strange till someone pointed it out to me. My son does the same thing.
@ImagineThat Thank you for sharing that! I'm somewhat the same way, but can only write and comfortably use a mouse with one hand, so I think of that one as "dominant". For certain tasks I'll use my non-dominant hand, or switch back and forth like you said.