i enjoyed the md 80 fiasco as well as an overnight in dfw courtesy of a broken 777 and a totally inept ground staff who could have moved 1/2 of us to the later lgw flight but as the purser said " that meant the ground crew chief would be late getting home". i hope you did not jinx yourself because imho you may be in the minority of frequent travellers on aa.
I've got another 70K miles booked this year - so we'll see. I think it could have something to do w/routes as I've been flying Transcons and TATLs rather than Mad Dogs thru DFW/ORD.
Doesn't help us at all to figure out why the OP wasn't re-invited to CK - but since the thread started turning into AA bashing, I thought it worth mentioning that not all flights are in fact late/canceled.