I've been on 757s on Eastern, USAir, Northwest, and America West. They are like a 707 with only two engines. I really like them. I prefer the ones with door exits instead of overwing exits, because if you sit between the window exits and the rear of the plane, you are a long way from any exit. I'll be flying on my first United 757 on Christmas Day, Flight 135 from ORD to LAX. Maybe you will be working my flight.
Fly Eastern's Golden Falcon DC-7B