There are some dining discounts, mostly for lunch on weekdays.
Some rental car discounts, similar to the
DVC rental car discounts.
The two biggest perks for regular AP holders are being able to purchase the DDE/TIW card. This card is $60 and valid for 20% virtually all table service meals at Disney operated restaurants, including adult beverages. Also good as a counter service locations at AK and the value resorts, and most lounges.
And the discount available for cash nights, depending upon season, discounts of 40% are not uncommon...a nice way to extend your
DVC stays at regular Disney resorts.
There are also a few shopping discounts at DtD, minimum purchases are required.