If stars is something you really want, then go for it. Yes, a lot of people have stars, but still, those who say "stars are out now" are those who look at tattoos as trends and get stars last year and covered them this year with a tribal butterfly, y'know? There are many ways to make it unique for you. You could make them a constellation that means something to you, you could put letters or numbers in the middle of each star to represent the people you love, just brainstorm!
If you decide that stars are not the way to go then just do the footwork and give it time. Go to tattoo studios and look through artist portfolios. Go to your local bookstore and geek out on all the art books and astronomy books or anything that inspires you. Brainstorm on books and poems and anything else that is special to you. That should get you started, and you can always take your partially formed ideas to a good tattoo artist whose style you dig, and create something together that will be perfect for you.
lot o' ink