My favorite holiday to decorate for is halloween, not sure why though. Maybe it was because growing up halloween was always celebrated to the fullest. My mom decorated the house, dad helped make costumes, we as a family carved the pumpkins and rosted the seeds and my sisther and I trick or treated until we were way to old to be trick or treating. It's fun to dress up, get a crazy sugar high, carve pumpkins, roast seeds and decorate. 
