What hobby or interest that you pursue makes you different or more interesting to others? This can be things that you think are normal, like participating in competitions that the school isn't involved in. Or something that you know is special and this is your chance to tell the world.
I will say that you play video games isn't interesting unless you compete and are ranked nationally.
Disclaimer: This may or may not be used in a spread for the yearbook and someone may come interview you.