I've had several ideas for tattoos since my mid teens. Boy, am I glad I never got some of those early ones... I don't think quantity matters so much as quality. Myself, I think I'd only ever want a few tattoos, and probably nothing too in-your-face. Since I'm more of a word person than a picture person, I've played with the idea of tattooing song lyrics and poems that mean something to me on various parts of my body.
I don't care one bit how many tattoos anyone else has got. To each their own. Personally, I don't find an abundance of super colourful tattoos to be very attractive, but I'm sure it can be on the right person, and it's not like anyone else needs or should want my approval or anyone else's for what they choose to do with their own bodies, just like I don't ask anyone else before I get a new piercing or dye my hair. *shrug*
A friend of mine has a photo of Amanda Palmer that he took himself (he's a professional photographer) tattooed onto his thigh. It's skillfully done, but I would never tattoo someone's face on my body. It's kind of like getting your boyfriend's name tattooed somewhere.