I like this thread. Here's my take on it...
Slightly higher wheel arches like the old roadsters. Those old roadsters looked good with the wheel arches hugging those taller tires.
Interior/trunk lighting
Ignition switch lighting
Better seats that actually hold you in place. The stock ones are like single-person bench seats. LOL
6-speed and LSD as standard
The hand-brake on the passenger side of the transmission tunnel.
Better, louder horn. I can fart louder than the stock horn.