Same as everyone else but the order for me is
Seeing my youngest son get so excited at the Gatwick Hilton the night before and sitting next to him on the flight and being bombarded with what car are we getting, can we do this etc [and watching my 17 year old pretending he is cool and not excited lol]
Smell at MCO
Monorail at MCO
Driving under the arches
ASMO check in and food court [we are home], we have stayed here so many times just give us the room no and then we feel like we have never been away
First night seeing and riding Spaceship earth at Epcot and chilling out to the fireworks
First full day in the morning walking down Main street and seeing the castle
And of course first beer or long island iced tea at asmo bar, now I have no work issues,or any other UK related problems disney take them away for 2 weeks
For me the first 48 hours are the best,