Breck's Vanilla Porter rocks. Not a real big fan of "holiday" beers. Something in the spices they all seem to have.
Some of my fave dark (side) beers: Tommyknocker Cocoa Porter, Widmer Snowplow, Guinness, Young's Double Chocolate Stout, Bristol Winter Warlock, Yellowstone Valley Back Widow Stout, Lefthand Milk Stout...
I'm at work (thus, I'm not able to look inside my beer fridge), so there's several more. Ya know, these are just "some" of my faves! ;)
Have any of you tried Boulevards Dry Stout...pretty good...crisp and smooth.
I really like the Vanilla Porter from Breckenridge as well. They have added a second brewery in Denver right by Coors Field.