Having owned my Prelude for 22 years now, here are a couple things that I think are unique with the Preludes.
The double wishbone suspension makes the car one of the best handling cars I've driven. Potholes and bumps are absorbed as if not there.
The ergonomics of the interior are perfect.
The shifter is un-equaled..even compared to todays cars.
The seats are the best I've used in a car.
I also own a Honda Fit...the doors and ext panels on the Prelude are at least twice the weight and very solid.
That said...I will prob never sell mine.