We have been to WDW 15 times. The best time of the year we found to go there was the week after Thanksgiving. Everything was decorated for Xmas and the crowds were very light. If you have small kids not in school I would highly recommend going to WDW during this time.
I know it'll be different when it's not as busy. I get all stressed with knowing we need fast passes for popular attractions and all that. When it's quieter, then I'm more relaxes! 
then so more money for Disney treats! To be at Disney at Christmas time if you celebrate it is just
magical . We were so happy when we went last year, but we did notice that the crowds picked up during Pop Warner. We went for two weeks since we travel so far so it was the second week after Thanksgiving that it went a bit mental
.