I am loving this thread! Some of these have been mentioned, but I still like to remember them myself!
I remember.
...not being sure if I wanted to see the abominable snow monster as we went through the matterhorn on the skyway (sometimes I closed my eyes instead).
...being disappointed because the matterhorn was -always- closed for construction/ refurbishment when we went to
Disneyland.
...a long line to ride on the original sub ride.
...booking it (or being dragged along at fast speeds when I was still small) to Space Mountain at rope drop for the first ride of each day.
...discovering that there was something up INSIDE the castle finally (only to have them close it a year or two later!)
...not loving the Country Bear Jamboree (I wanted to go on rides!)
...the amazement of seeing Fantasmic when it first started.
...my family distracting the CM and sneaking me on BTMRR on my first trip (at almost 4) because I was too short to ride.
...the Disney Afternoon Avenue with characters from DuckTales and Talespin.
...Honey, I Shrunk the Audience
...The Rocket Rods constantly breaking down, and waiting in a really long line for them.
...my dad getting us all up super early so we could be the first ones in line when the gates opened (before early entry existed)
...when Splash Mountain opened and it was the coolest thing ever.
...when Indiana Jones opened and it was the coolest thing ever now.
...catching glimpes through the fence and then climbing up to the viewing platforms as we watched CA be built over several trips.
...getting to see all the characters without official lines or places.
...watching the "back side" of the fireworks from the benches over by BTMRR.