i am a diehard for old school SEGA sprite-scaling racers. OutRun, OutRunners, Super Hang-On, GP Rider, and Power Drift are all must-plays. they all run great in MAME and have also had a number of high-quality console ports. later polygonal titles like SEGA Rally and Hang-On GP are also great but will be less impactful if you're already used to modern racing games
i see a few comments mentioning different F-Zero games and would like to throw F-Zero 99's hat into the ring. the sheer chaos of that game is really something you have to experience for yourself