Many good opportunities for miles redemptions.
Except for CLT, clubs are not ridiculously overcrowded. (Anxiously waiting for new AUS club.)
Warm nuts during meals on mainline flights.
Free inflight Wi-Fi.
Rebooking process via the app during irrops ("golden ticket").
Reasonably transparent about delay reasons via comments on ExpertFlyer and (now) via messages in the app and on the website.

AA does plenty to offset these positives (sloppy operations, uncomfortable seats, indifferent onboard service, poor IFE, useless SDC process) but they do some things right.