A solar system tattoo is really awesome looking. It would take a good tattoo artist to pull it off correctly. There so many ideas for this design. You can get it done fairly small, or pretty big on a large area such as the chest or back. Color would really bring this tattoo out.
Many people love the Christmas season so much that they get tattoos inspired by the holiday. I have seen everything from Santa, snow, The Grinch and more. Men and woman have gotten these awesome tattoos. Just try and be original. Get a good artist to do it.