The most fun car I have owned was a 64 VW Baja Bug, I could go almost anywhere, it was quick and I only had $500 in it.

Followed by a 180hp 914, with a well set up susp,

The 81 VW Rabbit diesel truck that I converted to gas & built to GTI spec..
Cars not owned by me
a Jackson Turbo prepared CRX (when they first came out)
a Hennessy Viper with the full treatment,
a 605HP Super Perfect Cobra
Full Race mini Cooper (a real one)
A 400HP 914s-6 race car.