I chose PresentationTube because I enjoy making videos and I will probably incorporate that into my Remix a Story project.  I wanted to do an interface that I would want to use in the future.  This was one of my top choices because I knew nothing about it but I was very interested by it.  It seems to bring together the aspects of PowerPoint and youtube videos to create a unique presentation.  I am excited to explore it more and figure out the affordances and constraints and what uses it might have for me.