>I have probably eaten everything you name for breakfast at one time or another. Lately it has been a yogurt smoothie most mornings. It's on the lighter side but keeps me full enough until lunch.

I've been having smoothies for breakfast for much of the past 2-3 years to keep my weight down. Like you said it is light, but keeps from me feeling hungry for a long time. I've stopped drinking them this winter since it is a bit unpleasant to have a cold drink in the winter.