i am ambidextrous, and so is my oldest son. as i have grown up, i usually have chosen right or left for different things, so one or the other is slightly better. ie--i usually write right-handed for convenience, but in a pinch i can do pretty well left-handed, not quite as neat, unless i'm in a hurry, then they're both bad. some things i do left-handed, or switch back and forth whichever is easier. ie--brushing my teeth, vacuuming, easier usually to do left-handed. i used to write halfway across the page lefty, the switch to right in the middle, but that requires a lot of squirming and twisting to change positions so often, so i went right with that. i don't know if that's truely being able to use both, or being able to use neither well??? wonder if switching on everything to the other would be the same? just a thought.