I have a question about teeth?

My teeth now do not look that bad compared to about 70% of people, but I didn't take care of them like I should have. One reason I think that I have a tooth on the bottom that is a little crooked is because I waited to long to pull my baby tooth there, could that have been why? If I would have took care of my teeth the way I should have, would they look like a lot movie star's teeth, like Tom Cruise or Bruno Mars?