I'm right-handed and it's my right hand that has been numb for years. I've somewhat gotten used to it and can now use my right hand more than I could when it was first affected.
I've learned to use my left hand and now I'd say that it is my dominate one. Except for writing I use my left hand almost exclusively now.
But what's weird is that it's my left leg that is my weakest leg. It's always the one that gets spasticity worse than the other.
I know what it is......I'm lopsided!