I'm a bit old fashioned and generally don't like any piercings on girls aside from earings. And even then it has to be only like one or two on the ear lobe. I can't stand it when they have like thirty rings going all around the ear. I used to think belly button rings were really hot back in like 1995 when they were pretty rare. Now like 95% of all girls I meet over the age of 12 have a belly button ring and it has just killed its appeal for me. I now find unpierced belly buttons sexier. I mean when fat girls, 10 year olds, and 40 year old women all have them how can they be sexy? Still if a pretty girl with a good body does have one I don't find it a turn off, I'm just sort of indifferent. As for other piercing if you want to have them go ahead but don't expect me to find you attractive.
I don't have a problem with dyed hair. I personally will probably never dye my hair unless I go grey before I'm 40 but I think it looks fine on most people. Pretty much every girl dyes her hair these days anyway so if you hate it you're pretty much screwed.
I tend to prefer natural colours but a pretty girl with green hair is still a pretty girl. I find that the attractiveness of hair is determined more by how it's cut then by the colour.
And finally we get to tatoos which I can't stand. I find they sometimes look okay on guys but I hate them on girls. I guess I just don't find them feminine and really masculine girls are a turn off for me. My big beef with them is that they're permenent so while that skull on your arm looks cool when you're twenty when you're forty-five it's going to look stupid. I've seen an out of shape 35 year old woman with one of those tatoos on the small of her back and it looked terrible. At least with a piercing when it no longer fits your look you can take it out.
I used to have long hair when I was like ten and it looked REALLY dumb. Shortly after that I tried a buzz and found out that my head is shaped really oddly and thus doesn't lend itself well to short hair. So I have to keep my hair in a delicate balance between long and short. You have to be able to see my ears but at the same time I need bangs. The worst haircut I ever had though was when I was 14 and it was popular to grow one's bangs as long as possible while keeping the rest of the hair short. I thought it looked awesome at the time but now I look back and shudder.