I agree with other members choices: Carrot Cake Cookie, Dole Whip (any flavor), Dole Whip Floats, Frozen Chocolate Covered Bananas, Handmade Cookie Ice Cream Sandwiches, Jalapeno Cheddar Cheese stuffed Pretzels and Sweet Cream Cheese filled Pretzels.
To add to your growing list here is a list of other favorites:
MK - Cheshire Cat Tail (Cheshire Cafe), Vegetable Spring Rolls (Adventureland Egg Roll Cart)
Epcot - Cloudberry Horn (Kringla Bakeri), Curry Chicken Pockets (Joy of Tea), Kakigori (Kabuki Cafe), Napoleons (Boulangerie Patisserie les Halles), Nudel Gratin (Sommerfest), Paletas (La Cantina de San Angel)
DHS - Grapefruit Cake (Hollywood Brown Derby)
DAK - Baked Macaroni and Cheese (Eight Spoon Cafe), Season Fries (Mr. Kamal's)
Resorts - Mickey Shaped Beignets (Sassagoula Floatworks POFQ), Zebra Domes (Mara AKL)
Places you should just go to and find your own favorites:
Fuel (Dolphin), Goofy's Candy Co. (DS-MP), Karamell Kuche (Germany Epcot), Zuri's Sweet Shop (Africa DAK)