I've flown on quite a number of planes over the years, from the small (Cessna 402/Dash-8/Fokker 70) to the largest (A380). One of the more memorable experiences, though, is flying on the 747. It's hard to put into words exactly what the feeling is; during takeoff, it's as though you are being lifted gracefully off the ground with almost no effort.
With recent announcements that production of the 747 will be ending, it will be the end of an era in aviation history: https://metroairportnews.com/boeing-announces-end-of-747/
I'm hopeful I can still fly a Lufthansa 747 before they're retired, though it doesn't look promising.