Years ago (when I may or may not have been of legal drinking age......... *cough* *cough*) I was head-over-heels for Sam Adams. While I've cooled down in that respect (to the point that I can't honestly remember my last Boston Lager) their Old Fezziwig Ale made a lasting impression on me. Only available in their Winter Mix Pack, and named after the jovial character from Scrooge's past, the beer is brewed with cinnamon, ginger, and orange peel. I remember it having a pleasant chocolate/caramel aftertaste. I used to buy the seasonal pack just for this beer, and it was one of the first beers to really open my eyes to the use of "non-traditional" brewing ingredients.
A more recent selection is Alaskan Brewing Company's Winter Ale. I tried this for the first time this year and fell in love with it. As I said at the top, I don't typically like "Winter Warmers" because of their over-emphasis on malts. Alaskan's Winter Warmer doesn't necessarily have that problem. I get strong hoppy overtones which balance this beer out. The "special" ingredient in the Winter Ale is Sitka Spruce Tops, whatever the fuck that means. All I know is that I get a creamy, fruity flavor when I drink it; hard to describe, it's like a bitter-less cranberry. Surprisingly, I don't mind the sweet fruity flavors in this one; in fact I rather enjoy them. It's a decent session beer, and one that I think does better when it's closer to room temperature than "straight-out-of-the-fridge" cold.
Hey, I may not necessarily like the style, but tis the season, and all of that.