I miss the energy, and family time we have at WDW. We are usually on the go from 8:30 - 10 or 11. When you are home, it is easy to get stuck in a routine (especially during winter) where you come home, cook dinner, watch tv and go to bed. WDW inspires us to do more (we took up skiing to have another family activity in the winter), but sometimes it is hard with long days at work, or other reasons.
At Disney it is all family, all fun, all the time. You just cant beat that quality time you get to enjoy everything WDW has to offer.
Other things I miss:
* As others have mentioned "the feeling"
* Driving from the Airport - once we see the WDW sign as you come down that final stretch!
* Getting our room keys and seeing where our room is.
* Our first night traditional dinner at BOMA's
* Walking around the world at EPCOT during F&W Fest, Music, Food - nothing better!!!
* Rose & Crown Pub for a beer/fish & chips
* Watching my daughter run to her fav rides at every park (HM, Soarin, Splash & Space Mtn,TOT,Everest etc...)
* Relaxing by the pool
There are many more, but these vacations have been worth every penny to us. People laugh when we continue to go back year after year, and honestly, I think DW and I would have continued even if DD never came along - we always loved it there. I dont know what it is, but there is no feeling like being at WDW.