CV joints replaced.
Rusty floors. One time after riding on a rough street, the body cracked open. I got out of the car and couldn't close the door, the front of the car had moved 5 cm ahead on the driver's side!!... Luckily, this car has a chassis.
Couldn't get rid of tires bumping up and down at more than 80 km/h, even changing shocks, tires...
Tricky 2nd gear.
Only left me down one time. I just got her out of the mechanic, and he had left the carburetor filling valve badly set.
It started every time: cold, hot, wet weather.
Front cranking windows make springtime rides a pleasure.
It's a lot more comfortable than any 2CV or Dyane. Front and rear passengers always fell asleep going back home from the disco...
The rear folding seat is very practical for luggage, a little longer than a R4, but lower.
Great driver ergonomics for a car that old and of that level.
Zips fuel like any 2CV, but has a 2 barrel carburetor that pumps a couple of extra HP when needed (you feel the 2nd barrel opening because the pedal gets harder).
Parts are very cheap and still available here in Argentina (Citroen left the country in 1980, but a lot of them are still running).
Servicing it couldn't be easier, since everything is handy.