I think there were at of great 90s designs, and a lot of ugly turds. I was a teen through the middle 90s, but I really didn't get bitten by the car bug until right around the 2000s. I've owned a 97 SVT Cobra and a 93 Jeep Grand Cherokee with the 4.0. I wish I had both still. I think the mid 2000s was the decline. Power and performance improved drastically, but a lot of cars lost their unique identity.
JDM cars of the 90s were something else! They still look good on the road. I saw a 300Z on the road Monday. It was a little rough, but still cool. Most Japanese cars now are utilitarian looking boxes. Very boring and so soulless.
Modern U.S. cars are going extinct for soccer mom crossovers. There were quite a few performance oriented cars from the 90s to the mid 2000s. Then everything was pared down to 1 or 2 models for a car company.