Nothing.
This has been the greatest car I have ever had and I can't believe they do not make them anymore. It gets fantastic gas mileage (50 mpg!) and is practically maintenance-free. It's easy to get around in this car and it is very reliable. The interior is comfortable, surprisingly spacious and the controls are simple and easy to read. The clutch pedal is extremely easy to push; a baby could press it down. Do I recommend this car? YES!!!
I have a 1995 Geo Metro 4 door Sedan and I have had little trouble with it. Except for replacing both the CV joints and dropping the oil pan to get the oil drain plug out because it stripped out. But other than that it's an overall good car for old people not young.