if there is such a thing as being partially aombidextrous then I would say that. But I'm more inclined to use my right hand for most stuff just out of habit.
I can't write worth shit with my left hand. But in sports my left side is often stronger. I would bat left handed in baseball, play right handed for tennisracquetball, stronger on my left foot/pole in skiing, in soccer I was a *little* better with my right foot but not by much.
edit:
people always think I'm left handed too, because I wear my watch on my right hand, and I do a lot of mundane things with my left hand (picking stuff up and such) and I sometimes eat left handed.