1986, as a 13 year old with my family & a friend's family. We stayed in the Ft. Wilderness cabins & went to the only two parks at the time, MK & EPCOT.
Second: 2010, with DH & DD, who was 5 at the time. We stayed at CR, atrium club level. This was the first trip for them, and might as well have been my first trip for what little I remembered from the first one! I planned that trip for two years and it was well worth it. DH said we'd go once and that's it; before we left, I think he'd already changed his mind!
Third: We're going back this October with two other families, all pulling our campers to Ft. Wilderness campground. This should be an adventure!