Fly or Turn Invisible?

If I was given the choice to be able to fly or turn invisible, I would choose to turn invisible. I would rather be able to turn invisible because then I would be able to spy on people and scare them. If I was invisible, I would be able to sneak up on people without them knowing I was there, so I would be able to scare them out of no where. I would also be able to fight people that I do not like without getting in trouble for it. I also do not really care for other people, so if I was invisible, people would not be able to see me, therefor they would not try to talk to me. If people did not see me and try to talk to me I would be able to be left alone and I would become a happy person.