I can't tolerate lots of fiber, makes me uncomfortable ("full" feeling in the rectum and sometimes gas). I stopped eating whole wheat pasta and breads because of this, just as bad as Metamucil. I don't need help to have a normal BM.
Fiber is for more than just helping peristalsis. Fiber is also required to feed the flora and to help with biding toxins and bile formation. Not all fibers are the same though, and some are more apt to cause bloating. For example, psyllium is hard on the intestines and tends to cause bloating. I prefer soft fibers such as rice or oat bran, which are also nutritious.