First off I feel a "favorite car" should be one a person can actually afford to buy, maintain, and properly care for!
I like my corvette roadster because it is fast, fun to drive, adaptable to the weather, reliable, appreciating in value and very purdy. Fits my needs to a tee .... and if I every feel the urge to get up to my elbows in grease I can always work on the Chevelle or sedan delivery.