Veggie dishes... there are so many! I guess my absolute favorite would be grilled red peppers, onions, and zucchini. So, I will bring those.
Seasonal decorating... I have high aspirations to decorate for the fall, but I don't really have many decorations, so it's usually a few pumpkins on the doorstep on the outside of the house. For the inside, I decorate the mantle over the fireplace. For Christmas, I have things everywhere! I love, love, love Christmas!
As for Autumn... I have invested too many hours looking at her behind. I usually have the earthcam site open, and I check it off and on. If I'm out for a while, I stop by the thread first to see new updates before I go to the earthcam website. I wish she'd just have her baby already!