I went when I was in elementary school and have almost no memory except for the Dumbo ride and Electric Parade. I went again when I was 20 with extended family and I was more interested in the Harry Potter area in Universal and hardly have any memory of Disney from that trip either. It wasn't until I went at 25 that I fell in love with Disney and have been going back every year. This will be the first year I am going more than once in a year.
I think the reason I like it so much (obviously
not from nostalgia) is because going to Disney is easy and I have a different experience each time I visit. There is always something new that I see or do that I haven't done in a previous trip.
Orlando is only a 2 hour flight for me, it has become familiar, I know my way around the entire resort, I feel safe at each of the properties, the Disney bubble is so immersive, I love the rides, lots to do and eat, going at Christmas time with the decorations and decorated castle is beautiful, the different festivals at EPCOT, etc... I could go on and on.
I'm trying to take 3 of my friends in February and get them hooked as well