I think I would use my unlimited lucid dreams on demand to redefine myself: first I would try out different personas and see who I like to be the most, and then once I found one that I liked a lot, I would choose in my dreams to become her, and in the process my waking self would hopefully become more like her because I would build good habits through my lucid dreams.

I don't know for sure yet, since it would require some self-experimentation, but I think my ideal dream self would have to be very self-assured and comfortable with herself; she would be less tired, have better memory, less likely to complain, a better listener, and less talkative and more concise (so that if she said something, each word would count), and less self-focused and more compassionate, and paying more attention to the world around her instead of to her iPhone or daydreaming. Did I mention that she would not have self-esteem issues? Lol