Problems with the parental units, advice?

So, I am 18 (have been for about half a year now). I am going to graduate in May with honors ( C u m Laude) and my parents are still controlling about every aspect of my life... seriously... My dad basically decided which University I should attend. I worked my butt off to go to a mediocre school ( he says because it's cheaper) . I can't dye my hair anything they deem extreme ( he threw a *****-fit because I colored my hair ombre ), nothing extreme I may add. I also have always wanted to get a small nose stud, but as you could have guessed... daddy and mommy blew up in my face. " it isn't professional" "you'll have an ugly scar" " you'll only find trashy men who like girls the way you want to present yourself". What do you suggest I do? I have tried communicating with them but that ended up in an over-dramatic argument. I know some of you will say to move out but to be honest I will be a full-time student and working - but not enough to support myself. I understand I have to respect my parents and their rules while I live with them but I feel like they are getting worse with time -__-.