The Chrysler 200s were some of the BEST rental cars I have ever rented. Smooth, quiet...felt a little gangsta... Oddly enough the best was some beat to death Chevy Cruze LT...had all the bells and whistles. Really liked it. In comparison I aways rent the 'Standard" class...so I got a lot of Hyundai Elantras, Sentras, A focus, ect. All for 8hr. + trips through mountains too.
With that said, the worst thing I have owned was our 03 XTerra. I just HATED the torsion bar / leaf spring combo. Terribly poor 3.3L engine. Only good thing about it was it sits up HIGH for a smaller SUV.