We went for 6 days in Jan 2012 and 10 days in OCT 2012. We also just did a day at all 4 parks as part of the 8 night Magic Cruise out of Galveston. That was on Jan 22, 2013. There are lots of Brazilian tour groups in January and the weeks we went were also the week of MLK holiday. So pretty crowded. I would go in October. The food and wine festival at Epcot is fantastic and the Not So Scary Halloween party was fun. Also, the weather was much warmer so we went to Typhoon Lagoon twice and swam at the Art of Animation resort when it got too warm at the parks. When we were there on Jan 22, the high was 65 and it felt much colder. I had on a long sleeved shirt and thick jacket and was still cold. They kept Magic Kingdom open late because it was so crowded. My absolute favorite time to go is November though because the weather is beautiful, food and wine festival is still going on, they have the Very Merry Christmas party and the Osborne family spectacle of lights, and it's much less crowded. We are going again this November.. Can't wait!