We haven't been going so frequently, but that's because my kids are older, schedules, money... DH and I did a trip (first solo!) this past January which was soooo nice!
We used to go in summer when the kids were little (and Christmas/Easter breaks) but, the last time we were there in the summer heat, I swore never again! It's hard to enjoy anything in the sweltering heat (I finally realized that that applies to Disney, too, despite denying it for years

)!!
I'm always trying to plan my next trip, but they are getting farther apart just because that's the way it is, not because we don't want to.