i think rolling thunder (the other wooden roller coaster-is it still there?) was the scariest to me mostly because at every turn you weren't sure if the rickety cart was going to fly off the track or if the entire thing was going to fall apart right there. also suspenseful.
rolling thunder ist still there, and El Toro was built OVER it in some parts, which is pretty cool. Rolling thunder is scary/fun. You feel like you might fall out, or tip over. Good times. I love when they have both coasters going at the same time, and you race.