i'm not a car freak, by any means, but there are a few that make me weak in the knees when i see one.
porsche 356 - this would be my ultimate (within reason) auto...
audi tt - took me awhile to appreciate it...
1990 volkwagon jetta - my first and only car (cheap/reliable/cool)...
1990 ferrari F640 - quite possibly the finest F1 car ever designed (john barnard was the greatest car designer)