Ok, I’m going to twist the question a bit this week and talk about which I would prefer out of being able to teleport or being able to time travel. Whilst time travel sounds very exciting, I think the concept is overrated. To explain why I think this, I would like to refer to a scene in the sitcom Red Dwarf (perhaps in my top ten list of British comedies ;-)). In the scene, the crew are in deep space, three million years into the future. Upon finding a time travel machine, they use it to travel back to the present day. They are of course still in deep space. Therefore, without a method of getting back to earth, the time travel machine is completely useless.
So, I would prefer to be able to teleport. I just think it offers more opportunities than time travel. I would love to be able to go and have dinner with my friends on the other side of the world.