A ride that I don't exactly like is Alien Encounter, in the Tomorrowland section of MK. It is not at all Disney-like and terrified my DS, who was nine! The poor kid was screaming, and this is a boy who is generally very brave. Let this be a warning to anyone who hasn't experienced this attraction....be careful about taking your children there! If there is even a chance that they aren't ready, don't do it!
On the other hand, my DH loves this attraction, and thus we go when the boys are not with us.