For the Roadster, it's a supercar. None of those things matter much.

For something like the performance versions of their high-volume vehicles, it's partially for the same reasons people like sports cars, or at least how some people like a sports car that is faster / quicker and gives them more excitement while driving (obviously a lot of the appeal for sports cars otherwise is the sporty look/sound of the engine, which Tesla doesn't really deliver on at all).