I switched right over to all whole wheat a while back, and I honestly didn't notice much of a difference. Food tasted a bit thicker, but it was really good that way and much more filling - didn't need to eat as much at once. DH loves it as well. I brought muffins to a work potluck once and got a comment that they were dense, with her nose wrinkled up. I brought the same ones to a more crunchy, vegan crowd potluck, and everyone loved them. So it could just be what you're used to, and if you're eating a lot of white flour stuff, gradually working up to it is a good idea