Interior sliding barn doors look fun. I've seen many of them on decor blogs. Here is a set that I saw last week in our local annual showcase of homes.
Finding good looking hardware to hang them seems to be a problem. I don't like the exposed track or supports. This one is better than most at hiding the apparatus but more improvement is needed. If you Google barn door hardware, you will see a lot of different styles, but most are exposed tracks. These were custom made by a local door company. I like the finish, though. For me, it would be a debate about whether to have this style or pocket doors. I do like being able to close off rooms.