Tying it in Feb for the 1st time, I didn't know it was Presidents weekend until yesterday but we are not going into Disney so not too bothered.
Done all the other holidays.
Xmas is a little quieter upto Xmas day but then crazy from Xmas day thru New Year, not a time to go if you want hot weather as some days struggle above freezing(others days 70+) not a good time to visit if you want to do a lot of rides, Soarin hit 6 hours last time we were there but if you want to see the parks and resorts at their best Xmas is the time to go its a great time to visit.
Easter again silly crowds, weather can be mixed, not my fave tiime to go but you can go for 2 weeks without losing school days(unless you get stuck with ash cloud as we did this year

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May, always seem to get bad rain when we go in May but warmer temps. Considered it for next year again but in middle of DS AS level exams so went for Feb instead.
August we love the weather, hotter the better, we can go for upto 25 nights(only 23 next year) crowds managable but too hot for some and expensive airfares unless you find a bargaain.
Oct, by far best time of year to go, perfect weather, low crowds, low prices, still get free
DDP if wanted, food & wine festival, Haloween events. We took DS out of school for 2 weeks every Oct to make 3 weeks away incl school hol from him starting Junior school until his 1st year at high school, don't advise that for everyone but it worked very well for us.