Visited all of them.
Efteling is such a drag to visit, you have to pay for the park map and without one it's nearly impossible to go between attractions easily, but you end up lost on some forest somewhere...
All the bigger rides are worth wile though, especially Joris. Too bad that you didn't go there after a trip to Liseberg (getting the cheap Liseberg season pass would have gotten you in for free at Efteling and some other great parks).
Toverland is a fun place, ride Troy many times!! The rest of the park is filled with loads of quirky stuff...
Walibi Holland is Goliath territory, the rest of the stuff is pretty bland...
Note that the station layout of Goliath (and Joris at Efteleing for that matter) is pretty screwed up since you enter the station at the front row, and since everyone wants to ride in the front it gets clogged up which means that the station might actually be empty even if there is a massive queue, so if you want to ride in the rear, just excuse your way through...
