I love he brilliant leaves of the golden hop, humulus lupus aureus against the black walls of the house. It grows quickly to about 10 feet or more every year, and tries to get into the house! You cut it to the ground at the end of summer and the bines are useful for making wreaths.
I also grow it on a wigwam of blue painted canes, where this year it has been joined by clematis 'Dark Eyes'. (£1 from the supermarket.)