Two Mile Run Extension: my vote for best 9'er. Plays like a good nine hole loop of a 4.5 rated course. Factor in dual tees + full-time dual pins...if I lived in the area, I'd rack up a lot of rounds here.
Linbrook: The region's hilly terrain and beautiful woods makes The Burgh a top notch DG playground. Linbrook's one of the beneficiary's.
Alligator Lake: interesting lines, dual tees, and full- time dual pins that really change how you'd play a hole make this a wonderful track.
Mason Sport Park: I still think it's a good course, just not on the same level as those above.
Special Mention:
Sam Masi in Medina, OH is 11 holes, but, so I guess it doesn't qualify. But I enjoyed the hell out of it.
Severe proximity bonus: you can loop in another 16 quality holes at quality golf at Roscoe Ewing
(without even having to move your car) , to make a pretty good day of it.
The two neighborhood parks are connected by a paved walking path. Play 1-8 at Masi, then walk down the path to #8 at Ewing and finish up on Ewing 7, and back to Masi for 9-11. The two pair nicely.