I like old British sports cars.  Though often criticized for poor reliability, their distinctive engineering and styling give them a character rarely found today.  The Triumph Spitfire in particular has always appealed to me, with its nice lines, small size, low posture, simple and purposeful layout, and neat features like the forward-tilting bonnet.  In stock form, performance is adequate, but the Spitfire has a lot of potential that requires only modest improvements over the factory configuration to realize, and these are straightforward and fun to implement.