Fly or be invisible

This really is an age old question, up there with "How many babies does it take to make a carrot cake?" and "Who made Stonehenge?" If William Shatner walked up to you and granted you the powers of flight or the powers of invisibility what would you chose? There are many factors that go into this question. 1. How fast can I fly? Well, lets think about that. William is not granting the ability to move faster than a human body can move. At a certain speed the human body can not function. What that speed is I have no idea, but I believe that it is safe to assume that you will not be able to fly faster than 100 mph. 2. How much energy does it take to fly? It takes energy to do anything, even sleep, therefore it must take some energy to fly. On the other hand, it is pretty supernatural that you can fly. Although ridiculous, lets assume that it takes no energy to fly. 3. What would I do with this ability of flying? Well, I guess I would fly everywhere I went. I might be really cold in the sky but I could create some sort of heating suit to warm me up. This is something anyone asking this question needs to think about. Let's be honest, some people would get bored, while others would love it forever. 4. What can I do with invisibility powers? Most of the things that I think of are not rooted in the forces of good. Most involve sneaking into places I shouldn't be or taking things that I shouldn't take. Can good be done with invisibility powers?

5. Do I have to be naked for it to work? You know what I mean, is the invisibility power transferred to anything I touch or is it anything that contains my DNA?

When it comes down to it, I would choose the ability to fly over invisibility. Basically, because it seems more honest and fun for me. What do you chose?