I have my lip pierced twice on the same side. They look cool, yeah. But now they're just a part of my face, and honestly, they're annoying! I only keep them there because my face is use to them, and I think I'd go insane if I didn't have something to keep myself occupied with. Keep in mind though, if you get a lip stud, your teeth DO get caught on the back when you chew, and sometimes talk. And let me tell you, it REALLY hurts. It's why I have a horse shoe on my furthest piercing, so it won't get caught. My stud well.. I just got lucky and it doesn't catch on anything.
They actually only hurt for a moment, and then afterward get swollen in about a day, then hurt for a week. I would say I nose piercing, just because it's less trouble, and nose piercings look good on a lot of people.