Former '01 S2000 owner and the only thing that I miss is the top down experience which is not an S2000 "thing" per se. From a handling, daily driveability, power, you name it, S2k will become a faded (but pleasant) memory. Maybe one other thing to miss is the (liveliness?) of the S2k.
I did not miss the harsh ride, noise, zero torque, tight interior, and hi-speed curves on less than smooth roads (strong pucker factor). Still loved the car though...

But I'm all grown up now.
J