I just realized I've been happily following along but haven't made my own post yet.
My favorites:
Poly: Lapu Lapu or Backscratcher from Tambu Lounge
General Menu across property: Captain's Mai Tai, Banana Cabana, Classic Margarita, various craft beers offered at different locations
AK: Frozen Yak Attack from Quality Beverage window (right side of Yak & Yeti QS)
African Bloody Mary from Dawa Bar
HS: Sidecar from Brown Derby Lounge
Frozen Golden Margarita from Anaheim Produce
Epcot: La Fin Du Monde beer from Canada Popcorn Stand
Innis & Gunn beer from UK Beer Cart
Black Velvet Guiness/hard cider mix (not on the menu) from R&C Pub
Grand Marnier (orange) Slushie from stand in France
Frozen Italian Margarita from Gelato Stand in Italy
Oktoberfest from beer cart in Germany
Carlsburg from beer/snack cart in Norway
Cantaloopy from cart in China
Frozen Fiesta margarita from stand in Mexico
Avocado, Passion Fruit or Cucumber Margarita from La Cava
***Tip: Drink lots of ice water & Pace Yourself throughout the day!***