I agree with Greg, the sport seats are very uncomfortable, although they are really cool looking. Anyway, even though I love my c6, my long-lost 1990 still has a special place in my heart. One issue peculiar to almost all 1990s I have seen is the inflatable restraint warning light. What happens is the impact sensors lose their ground on the frame rails, and the light goes on. The fix is relatively simple: sand down the frame and re-ground the sensor with some dielectric grease. Some unscrupulous owners might just simply remove the bulb from the warning display, so when you start the car make sure this warning lights up.
I replaced so many things on my various c4s, but here is a laundry list: alternator, radiator, the entire a/c system (& recharge), u joints, valve cover gaskets, fuel injectors, radiator fan motor, oil pan, front leaf spring, shocks, water pump, egr valve, valve guide seals, brake booster, master cylinder, windshield wiper motor, intake manifold gasket, air pump, and upper and lower radiator hoses. Even though the car may be low mileage, it's still almost 20 years old, and sooner or later you'll be replacing all of these things.
Stylistically it's actually my favorite corvette, if you can believe that. The car is beautiful, I love the way the doors curve around and then wrap under the frame rails, I love the way the front end looks, wide and flat, and the four round rear lights inset into the concave bumper. I like the newer style interior too, it feels like a cockpit.
Whenever I see an early c4 I always turn and check it out and wish I had kept my last one.