We've just celebrated 19 years together and hoping for many more. This car just runs and runs - nothing but routine maintenance. Over the years there have been several brake jobs, a set of CV boots, a new radiator, several sets of Michelins (only way to go for the original feel), two timing belts, and new motor mounts. I have averaged just about $250 per year over the life of the car. Radio, tape deck, clock and AC work great - usually the first things to go! I'd add a CD, except I don't want to ruin the ambiance. Every year I go test drive new cars and decide I'm not ready to part with this one. The kids have given up on inheriting it any time soon.
It continues to run, without any major expense. Paint still shines and interior is in great shape. Good design. Comfortable to drive. Peppy. Responsive.
Ditch the automatic seat belts (which they did in later years). Otherwise, everything I have to suggest wasn't around in those days (traction control, bluetooth, etc).