So I've been to Disney many times and am planning many more trips, but want to get it down to a specific month I like best to travel.
I've been in -
January - love it, went in 2014 low crowds, but a little chilly and couldn't really visit the pools.
March - went in 1999, weather is really nice, but spring break is rolling in and crowds are getting high toward Easter
May - went this year in 2016 Memorial Day. Heat was terrible, 90's every day. Crowds weren't bad.
August - went in 2009, heat was unbearable. Crowds were definetely low.
November - planning this for 2017, can't wait. Hopefully crowds are low and weather is still nice.
Never been any other month, but really would like to know experiences. Definetely want a April, October and December trip in the future.
We've loved our trips in July.

Deluxe resort prices are lower in July & August than for most other times of year, & then there are strong resort discounts on top of that. Staying at a Disney deluxe really adds to the magic of our trips, as well as the convenience & ability to have some pleasant down time each day.
The crowds were quite low this July, too-
loved that. The Disney water parks & resort pools are fun & refreshing in summer, and it's great to not have to worry about getting wet on rides like Splash Mountain- even if you get drenched you'll be dry in less than an hour. There also tend to be fewer ride closures mid-summer than at other times of year.
Lots of people on these boards complain about summer heat, but we also visited this January during a cold snap when it was literally freezing all day (including the wind chill).
That was miserable. We're life-long Texans & used to hot summers, & even love the daily rains, which we don't get in arid Texas. Florida is green and beautiful mid-summer, whereas much of Texas turns brown.
You've got to pack carefully for a summer trip to Florida, just as you would for a winter trip to Colorado, in order to enjoy it. I pack Teva sandals, a
UV umbrella, sunglasses, and then it's off to WDW to enjoy a magical trip.