I love piercings. I have two sets of lobe piercings [four total] with the first set gauged to 00, a cartilage piercing in my ear, a lip piercing, and most recently a septum piercing. Seven total. I'm getting my nipples pierced next, though I'll probably wait a little bit since my septum is still healing.
My dude just got his lip pierced about a week and a half ago, and I really like it on him. The problem is that somehow it's ended up infected despite strict adherence to the piercer's cleaning instructions. We had ours done by the same piercer about a week apart, really good at what she does, and we're following the exact same directions with cleaning, yet I've had no problems with mine. So he'll probably have to get rid of it at some point if we can't heal it. If he takes out the jewelry now, the infection will likely heal inside and it'll be way worse, lol. Anyway, I also like nostril piercings on guys, ring or stud, and gauged ears. Mainly it depends on the guy. I wouldn't object to genital piercings either, haha, and nipple piercings are cool too.
I like tongue, belly button, hips, nose studs, and ears(which are neutral because they're not really noticed). The rest I have a general dislike of. Septum piercings are a HUGE turn off. I can't stand them at all.
on a guy? I think that it just depends on the guy personally I've dated a guy with a tongue ring which is amazing! so sexyy and also a guy with an eyebrow ring which looks good when on the right person it kind of just depends on the guy and his personal style