Corrado G60 (when new). Really expected to like it, but was let down by nose heavy feel and lack of power.
Evo X (new and modded). Felt significantly more bloated and soft as compared to the Evo 8/9.
MKIV Supra (when new). Felt big, heavy and did I mention big? More of a Corvette/Camaro feel than I was hoping for.
Nissan Leaf (and I own one) - Had so much potential to be a fun, great handling car (batteries in the floor = low COG, 100% of torque down low, etc.) but let down by crap steering, suspension, and tires.l
Smart Fortwo (and I own one). Crappy shifter, crappy handling, and no power. Now a total delight after mods, but it took some tinkering to get it to where I am happy with it.