I've been doing this several times a week for over twenty years. It has only affected my waking life in positive ways. They became addictive during my first year, but I quickly learned that every night is another opportunity and the feeling subsided. I have used them to solve computer problems, to solve ethical problems, to learn about myself, and to explore.
Rothgar said it well. Lucid dreams are self-limiting. It is pretty much impossible to become addicted to them, unless you are literally sleeping all day and night to have them, and that is hard to do anyway.

If there were any negative affects, I would tell you.. Frankly, why would I try to sell the idea to you? Why would I care? Nothing bad has ever happened to me due to lucid dreaming, and there is no reason for me to lie to you about that.