We've been Thanksgiving week twice, twice during spring break, once during the summer, once over Veterans weekend and once in October. May was by far our favorite time. We visited the first week of May last year and loved it. The corwds were there, but nothing compared to Thanksgiving week or the sumemr. There was only one small rain shower and we were inside when it happened. It was pretty hot but nothing too unbearable.
We went just this past November for Veterans weekend. We experienced a 10 crowd day at Magic Kingdom that Saturday and then a 2 crowd day at Epcot that Monday. The difference was night and day. According to touring plans, last year the crowds for the first week of May fluctuated between 5-7, which is a bit high and I think touring plans predicts the crowds the first week of May this year to range between 6-8. Looks like the word is out that May is a good time to go!! lol