Test drove a Sky and S2000 but the MX-5 felt more like a classic roadster. It is very responsive and has totally replaced the "need for speed" that my motorcycle satisfied. It is real nice on a Saturday cruise to have A/C, heat, music, and a top when it starts to rain. I am going back over my favorite motorcycling routes and enjoying them more than ever.
Responsive handling, braking, and throttle. Ease of ragtop operation.
Remove the door mounted cupholders. Make the seats a little softer. Redesign sunvisors so they swivel out to the side windows.