Yes and no. After enjoying lots of French toast throughout my life, I've found that you can really make French toast out of any type of bread. However, the best French toast comes from bread that has some kind of texture, like sourdough, crusty French bread, brioche or challah, or even baguettes. Other breads can be overly dense or too soft. If you have bread on hand and you're not sure how it will work, it's probably worth a shot!