I don't have a lip piercing but have nothing against people that do. They can look pretty cool but I have heard they hurt for a while after you get it. And that eating and drinking feels a bit weird at first lol. Just remember that certain jobs don't allow that type of piercing. I don't know if you know what you want to do in life yet occupation job but just be aware about that. If you are set on the idea go for it. Just make sure it's well thought out.
A definite deal breaker. I don't like any piercings except for single ear studs or ear rings. Generally, I don't like tatts either. I have only ever seen one tattoo I like and it is a real masterpiece of artwork.