I agree that you should consider getting highlights into your hair, simply because it adds a chance to put more contrasting or unique colors into what amounts to the very normal and plain hair colors we all have. It is a good way to make your hair look pleasing to the eye.
If I were to put highlights in my hair I believe that it would not look right for me. The way my hair currently looks is fine by mine. Some people might look right with highlights however. It would ultimately come down to the person the way they would look.