Which lip piercing should I get?

i wouldnt put i to the side because your lips are fullest in the center and having it on the side will look severely disproportional. my friend has one in the middle and it really cute. be careful though, that piercing gets rejected if the ring is to small, and it leaves an ugly scar. you may not want a little piece of the bar showing but its the best thing if you plan on keeping it, less likely to get infected also.