It depends on the guy. Some guys do and some don't. I myself have dirty blonde hair but I am dying it dark like almost black because it will make my blue eyes pop. Do what YOU want to do, not to satisfy guys and what they like.
it depends on your face. some girls who have fairer skin look good in black hair as oppsed to blonde. but a lot of tomes it looks really fake and bad. its not what color hair you have it's ow it works with your face and skin tone