Oh, man, that's amazing! Maybe I could meet him some day here. If All Might even shows up, I'll be sure to introduce you.
Let's see. Most people only have one. Some people have two, though. My friend Todoroki does. He inherited his father's flame power and his mother's ice abilities. For a long time, he rejected his father's Quirk because they didn't get along. But, lately he has been trying to use both. He's amazing to watch. He can use ice with one side and fire with the other side.
He's one of the few that I know personally who have two Quirks, but there are some others that do, too.