For many of the above reasons, ALL my North-South travel has been on AS for some time now. Service to Mexico from LAX (CUN, PVR, SJC and others)is also a bonus! You might also consider an AS Bank of America Platinum Visa which will also earn you a $50 Companion airfare coupon, some additional upgrades, Board Room passes (for the first year) and some other goodies.

My last Sh*ttle flight was more than 5 years ago, and I never looked back.