I would use the chance to expand my mind by exploring it to the ends. I would do things that I think are not at all possible in any situation, even a dream. I would try and invent new colors, try and experience the ketamine "void", do so many things.

I wouldn't get bored. I would maybe enjoy an occasional normal dream once in a while, but really there is so much lucid dreaming can do for you. I would really try and explore the limits of my psyche.