Most things I do right-handed, but writing, eating, playing pool, and guitar I do left-handed. I remember first trying to play bass seriously and playing with a friend's, but when I flipped it over, it just felt "right".I'm a lefty and never considered playing left-handed. I'm ambidextrous with most things, but not bass or guitar.
Chopsticks are the only thing I can use equally as well with both hands.