I'm with Chep on the Norway Maple. They're only slightly invasive here in Potsdam, but the Village, and others have planted them all around town and I wonder WHY?? They split in super cold weather, they break off in big summer storms, and they don't turn to nice colors in the fall. Saddest of all, Sugar Maples grow very nicely all around town, where some clever folks saw the value and planted them 100 years ago. If only folks had been so clever 50 years ago...