My worst car was a Vauxhal Victor 101. This car possibly had the softest suspension of any car including the Citroen 2CV. On a strait road the ride was very smooth but cornering there was so much body roll, and you had to hang on to the steering wheel to stop you sliding along the front bench seat covered in a shiny plastic material. The bodywork dissolved while you watched in the rain.
The best car for performance, and comfort without doubt is my GS450H, In reliability, and economy terms as in the post above over 10 years, and 140,000 miles my Prius gen2 Tspirit wins hands down. The only item replaced in that time was a NSF wheel bearing getting noisy due to pothole damage.
John.