Let me reassure you... it is not sweet! It does not taste like pumpkin pie, and you actually can't even taste the pumpkin as a distinct flavor. Adding it simply results in a lovely, thick, very flavorful stew. I made this recipe for the first time almost exactly five years ago. Cooking pumpkin recipes this time of year is a beloved tradition of mine, and I know I'm not alone in this. :) The first time I made it, I expected it to be a purely seasonal (not to mention experimental!) recipe. But this chili turned out so well that it is now my favorite chili recipe I make throughout the winter (actually, throughout the year!). I even prefer it to my excellent no-bean chili. I think it's richer and more flavorful.