Superhuman Powers

Being able to have any super power I want would be very cool. There are many different possibilities to choose from, so it would be hard to choose only one. But growing up, I always thought it would be cool to be invisible. You could get into anyone's conversation without them knowing, and you could sneak out of your house easily. I also wondered what would happen if you were invisible, but one day you couldn't go back to normal. Would everyone think your dead, or would people think they are going crazy?