Ok, so a great spin on pineapple upside down cake is, use the pineapple juice that comes in the can, for the water required in the cake recipe. It makes the cake a little more moist, but gives it a better pineapple flavor.
Then, use a brown sugar bottom where you put your pineapples on. When you are done, sprinkle with cinnamon sugar and I promise, this is the best pineapple upside down cake around.