The eternal nine
I thought that someone would mention Northwest and their (now Delta's) DC-9s.
We have flown in various iterations of the eternal nine (DC-9, MD-8X, 717), and have always prefered them to either the single aisle Airbii or the 737.
These things seem to be remarkably well made, with simple systems that can be easily maintained.
The DC-10, despite its early cargo door problems, and the DC-8 seem to be durable aircraft as well.
I'll make a snide coment to the effect that most MD-11s seem destined to be lost in mishaps before they can reach graceful old age.