If I ever have 15-30 minutes that I can take to myself, or need to walk fro Duke Energy Center to the Wachovia buildings, I always hook a right into the Green. I love the scenery, the people watching, and the sculptures that encompass the area. The restaurant options are also great - Sandwich Club, Matt's Chicago Dog, Aquavina, some Mexican place, and Fuel pizza.
The police have been great about keeping the vagrants out and ensuring this stays a great place for families and professionals to eat lunch and enjoy the outdoors. I don't know if I'd walk through here alone at night due to the dark corners and shadowed areas, but during the day its great. The old church attached also adds a nice calming quality when the bell chimes on the hour.
No wonder this place is Roy G. Biv's middle name.