If Pumpkin Spice Latte's aren't your thing, maybe this is: the Pumpkin Cheesecake Frappuccino. Apparently it's on the secret menu at Starbucks and tastes like cheesecake in a cup!
Since the Pumpkin Cheesecake Frappuccino is a secret menu item (AKA a drink you can customize to get that flavor, not an actual item on the menu), it's very likely that your barista won't know how to make one if you request it by that name. Instead, order a base Frappuccino and customize it with whatever additions are necessary. In this case, you would ask for a creme-based Pumpkin Spice Frappuccino with a pump of Cinnamon Dolce syrup, a scoop of vanilla bean powder, and a pump of white mocha sauce. [Source]