I'm ambidextrous, but it's a unique situation. I would have naturally been right-handed, but my mom is left-handed and when I was a kid she used get behind me to teach me to write and "taught" me to be left-handed for writing and eating.
In most cases, I can use either hand for various things, but I and throw a ball right-handed and use the PC mouse as a right-hander. I eat and write left-handed, for example. I write on a chalk board with either hand......shoot pool with either hand......play tennis with either hand (before I lost my eye that is). I CAN write with my right hand, but I tend not to. It gets fatigued easily and I'm much sloppier since I don't practice right hand writing.
Basically, any new activity I do, I can do with either hand. Like stylus games.....when I get fatigued using one hand, I can switch to the other.
It comes in "handy" being ambidextrous.