I have 2 pairs of ear lobe piercings, 2x helix, tragus and nose. I'm not wanting anymore at the moment. But I'm thinking of a tattoo. I'd like a small one that no one can see. I'm not going to rush into it though, I'd rather be completely natural (which I think is quite nice anyway) than have inked up skin that I didn't like!
I personally love tattoos and piercings. It depends on the individual.
I have facial piercings and visible tattoos and I really don't care if other people like them or not, people should like you because of your personality, not because you have piercings and tattoos which they may or may not like.
Very small tattoo, in an inconspicuous place is ok, but not more than that.
Piercings can be sexy, but again, keep it under control. A belly ring is way sexy, but I'm not into eyebrows, lips etc.
Personally, it depends on the tatto(s), how may piercings, and where the both the tattoo/piercing is located. A smaller tattoo is generally better and in a place that isn't staring you in the face every time you see the person. I don't like a lot of piercings much besides ear (multiple ear piercings are OK), and at times a belly button ring but that varies from time to time.
I agree with you when you say you don't want to be stuck with a tattoo you don't like given the expense, pain, and time in removing them. And for me, natural has no "ifs" so you couldn't go wrong staying natural.