Chuckles,
I owned a Vega wagon back in the day. Other than the deep scores in the cylinder bores (I removed the head and looked for myself), with the consequent really extreme oil consumption, there was nothing wrong with it. Keep adding oil, and it would (and did) run for a very long time.
I owned two Corvairs. Great cars, as anyone who has actually owned one will tell you. Yeah, you had to be aware of the heater boxes, and oil leaks (mainly the pushrod tubes) were endemic, but there was no same size package with the interior space of the Corvair, and the cars had awesome cornering ability, if you knew how to drive.
I owned a Citation. The V-6 was rough and thrashy, but had ample power. Overall gearing was very tall, which made for quiet and economical highway cruising. Ride was GM contemporary (floaty), and the car would hang as well in the corners as you dared to try. The Citation was a really roomy car, but was let down by really low rent interior materials, including the seats from ----.
Now, I am a dedicated import buyer these days, but I think GM often gets a bum rap. There are pleanty of trouble prone European and Japanese models as well, but the American nameplates seem to take the brunt of the abuse.