I agree with Vivi on the Mario Kart issue. Mario Kart 64 was an excellent game as was Double Dash. A couple of the handheld games are also excellent.

Super Mario Kart still has the edge though in terms of fun, control and playability. It will not be surpassed! The blue shell is the worst thing to ever happen to the series.

Sticking with old school games... the original Pilotwings was never bettered.