8: Buick Reatta
GM tried to introduce many unique coupes in the ’80s and ’90s, but the Reatta was particularly eye-catching. The design was far different than anything on the road at the time. The digital display and the interior were luxurious for the time period. But the rest of the Reatta was questionable at best (via The Truth About Cars).

The compact design of the car didn’t feel like a traditional Buick model. This is something that alienated a lot of the consumer base. The Buick Reatta was by far one of the most unique GM sports coupe offerings on the road. However, the reliability and cheap build quality of the car simply gave it a lackluster reputation.