I, personally, find tattoos and piercings sexy, on men and women (and I'm bisexual, by the way, for those of you who didn't know). However, I do think it is a matter of taste and style and sophistication, even. There are many tattoos that I find distasteful and even gross. And some people can get carried away with the piercings. I like them and have them in moderation.
I have actually taken out most of my piercings and decided not to get anymore tattoos because I found a lot of men didn't really care for them and, being a provider, it would make me less marketable. Aside from my ears in which I have 3 holes in one ear and 9 in the other (but only wear 1 pair of earrings these days), I only have my nipples and belly button pierced right now. I've taken out my tongue ring (only because it can fracture your teeth) and my clitoral-hood ring (because people used to suck on it too hard and it would hurt). I did, however, have multiple piercings when I was in my earlier 20s but kind of grew out of it (ears, eyebrow, nose, lip, tongue, breasts, belly button, hood). I'm happy with what I have in now and look at it as body art. I even, occassionally, get requests to put my tongue ring in (which is a pain in the ass because only the top is open -- I have to pop open the hole on the underneath side of my tongue, but I usually oblige).
As for tattoos, I currently have six and have no intention of getting anymore (the marketability factor). The ones I do have are not big or colorful or, in my opinion, distasteful. I like tribal arm bands so I have one of those, and I find tattoos on a girl's waist (on her back) to be sexy so I have one there too (a Chinese dragon). I also have a tiny one below it where the little triangle of a thong rests (which my best friend April, aka Samantha Summers, has a matching one, by the way), which most guys find to be a really sexy place. Then, I have one more on the back of my neck (a tribal sun, and also a trendy sort-of place), so they're mostly on my back. Then there's one on my tummy near my belly button ring, and my most popular one, which is like an ankle bracelet of two girls in a 69. Boy does that one get a lot of attention in the summer!
I don't consider what I currently have to be "overdone" and think I have a sort-of modern, trendy, fashionable look, however, I do wonder if there are hobbyists that don't see me because of them.
(I might also add that the reason I chose to grow my hair long is because even though I had a cute, short haircut that was very modern and fashionable and sort-of European looking, a lot of guys didn't seem to like the fact that I had such short hair and it restricted my clientele.)