I had my lip pierced for 3.5 months. I always wanted it done, so finally I did, but the novelty wore off. Now I have a scar as a reminder, haha. I wore a labret stud in it (it was on the left side) and it didn't affect speech, eating, etc. I just had a bad habit of constantly chewing and biting on it, which drove some of my coworkers crazy (60 year old women apparently don't find a lip piercings fascinating, haha).
I also have a ton of piercings in my ears... 6 lobes (3 on each side, first hole was a 0g at one point), left conch, two left cartilage, and an industrial style on my right.
My navel is also pierced 4 times... and I use to have my nipples, and two others in my ears.