For years, the 757 was a staple at my home airport of SNA. Spent lots of time in the old Eisenhower FC seats, but never flew the NGBC variant. Once sat next to a recently-retired Bob Crandall flying from DFW to SNA. We chatted almost the entire trip, really fascinating guy.
I loved when they used 2L for boarding, really made for a pleasant boarding experience. While these still pop up on some of my DL flights, the last time I flew on an AA 757 was back in 2013 from LAS to JFK.