I think the desicion is ultimately yours. If you go along with everyone else, then you will end up with holes all over your body when you're 50. But if you want my opinion, I wouldn't get any cartilege pierced. ONLY skin. Cartilege hurts for weeks. And if you don't take care of it, it could hurt for months. It's fine if you want to get two or three peircings on your earlobe or get one on your belly button, but just try to look your age. That's what I believe :]
Actually, Cartilage doesn't hurt for weeks. I got my nose pierced and it actually hurt LESS then when I got my ears pierced.
Anyway, I have my nose pierced now and that's it. I'm planning on getting my belly button pierced soon. ^^