I guess I'm your token leftie.
I hold my pencil funny, turn the page at an angle, the works. When they insisted on teaching us pen-and-ink instead of cursive back in grade school (ah, the 70s and their amusing notions of "progress"...) I had to learn to write all my sentences upside down and backwards, because otherwise the ink smeared. (And I still can't write in cursive!)
The only thing I do with my right hand is scissors, because when I went to shop for my first day of school, the store didn't have any leftie scissors, so my mom got the regular kind and said, "Just learn to deal with it."
And that whole left-brain/right-brain thing is sort of misleading, because most of the artists and poets I know are righties, and I'm a mathematician and a leftie. Go figure.