At the conservative church where I grew up, my entire childhood/young adulthood was a huge list of DON'T's-- so certainly any other piercings besides ONE tiny puncture in each ear was definitely a DON'T. I don't have tattoos or any "alternative" piercings... but, I have always been drawn to people who DO have them and still am. I suppose it's my own way of subconscious rebellion.
I don't like the look of "other" piercings for myself (I just have the standard single-pierced ears), but I've been friends with people who have had all kinds of different markings and body jewelry. A youth pastor at one of the churches I attended had those round disks in his earlobes, which isn't something I'd want personally, but he himself was a lovely person.
I always get a kick out of Christians who freak out about nose rings. Rebecca, the woman that Abraham's servant Eliezer found to be his son Isaac's wife, very clearly had a nose ring, because it was one of the pieces of jewelry that Eliezer gave her for watering his camels: "So I put the ring on her nose and the bracelets on her wrists..." (Gen. 24:47.)
As if this wasn't enough, God Himself says, about His affections for Israel as His bride that: "I clothed you in embroidered cloth and provided you with leather sandals. I also wrapped you in fine line and covered you in silk. I adorned you with jewelry, putting bracelets on your wrists and a chain on your neck.
I put a ring in your nose, earrings on your ears, and a beautiful tiara on your head..."
But many of the Christians I grew up around considered things like nose rings to be a horrible sin that would certainly send you straight to hell. Ironically, these same people would then tell us that we all needed to go home and read our Bibles regularly.
Apparently... They didn't want us to read the parts of the Bible that they themselves had missed... or never read.