Which do you prefer, Steel or Wooden rollercoasters?

the older the wooden and steel rides the more likely they would be bumpy. Like wooden coaster " Thunder Hawk" at Dorney Park PA. Also steel coaster " Great American Scream Machine" at six flags NJ is very bumpy. So when I go to an thrill park, I ride every coaster and if I dont like it, I don't ride it. hope this helps. :)