I think you can pretty much do anything with your hair colour, although it’s true with dark hair you have to be careful as it can go brassy if you don’t know what you’re doing.
Having said that I’m dark and use a mid brown box dye, it blends in my greys, actually a lot of people think I’ve had it highlighted. If I didn’t have greys to blend I mightn’t bother though!
I didn’t like my colour much when I was younger either but I look back at the photos differently now, I do think dark hair can be very attractive.