Magnum and Maverick are ones that I don't like because you fly out and hit your legs on the lap bar, hard. But since this still in KICentral I would have to say The Racer. It's rough, unthrilling, and overall a mediocre experience compared to all the other coasters at Kings Island with exception of few. Last year though, Vortex was my least favorite because of head banging and my ears hurt. Now it's fine because I grew over the off-season. The ear banging on Vortex zone is approximately 5'2" - 5'9".