The Duke at Rancho El Dorado (Maricopa, about 30 minutes from PHX) was a delightful find. The course, designed by a guy named David Druzisky, is not terribly difficult, but our whole group (Handicaps from 3 to 16) loved it. The ground does not look promising and there are houses and whatnot along some of the fairways, yet the hole designs and green complexes were genuinely fun to play.
Not especially challenging or a shorty full of funhouse quirk, but every hole had some element that made it interesting; I guess part of what attracted me back again was that all the features worked together in a visually pleasing way. It was like that chick you don't normally look at twice, but once you do, there is plenty to keep you busy. Nothin' fancy mind you, but when you walk off #18, you'll have liked it a lot without being able to put your finger on exactly why.