I have a metal roof, though my house is not a rental. It is not loud. In fact, because they put down an extra layer of insulation, my roof is actually less loud than they old roof was.
Metal roofs seem to vary regionally - I see more of them up near the lake, but hardly any of them around me. (We've had people come to the house asking where we got our roof, so it's pretty noticable.) I see lots of metal roofs in residential neighborhoods in Florida, though.