If I could be any living thing other than a human.

 

This would be a very interesting topic to discuss about for me personally, I think a vey generic answer for most people would be an animal because that could be the first thing that pops into mind when you hear this topic. For me I choose something much more different, I know that there are numberless solar systems in the universe that have life on those planets so I thought since we know a lot about the living things on Earth what about the living things on other planets that we haven't yet discovered. So from that Idea I would choose to be a living thing from another planet to experience something new and to learn about intelligent life on that planet.