My favorite AA 763 flights were on DFW-SFO and SFO-DFW, around 6 years ago. Those flights were on 757s when I booked, but AA changed the aircraft to 767. With the 767 having more F seats, my upgrades cleared on both flights (though the return flight cleared at boarding). The seats were the now retired NGBC angled flat seats which were a nice step up from standard domestic F seats.The SFO-DFW flight was delayed 30 minutes - after pushback the generator failed causing all power to go out. We were towed back to the gate where mechanics repaired the generator.