I like sitting near the window watching the wings waving up and down gently, and thinking to myself that people like me had a hand in designing this...
Have you ever sat right at the back on an aisle seat of something fairly big (i.e twin aisle) and before they draw the curtains you can see all the way down the plane, look at the line of the overhead lockers and see the whole length of the fuselage bending
I also like to watch the wing tips wobbling around, makes me remember the various wing bending test videos around, there was one for the 787 where the wings got to something like 40° before they finally gave up. I like to listen to peoples stories of turbulence who describe how the plane was being shaken to pieces etc etc, imagining the pilots bravely wrestling with the controls when in actual fact all that's happened in the cockpit is the pilot has asked a stewardess for a napkin as he's spilled his orange juice

. I've given up explaining that nose wheel imbalance/fan blade out is waaaaaaaaayyy worse than any turbulence, in fact I've all but given up explaining my job, I just say "engineer" and that's enough for most people