Has anyone tried growing microgreens?

We plan to grow microgreens for the first time this fall. The choice of seeds seems to be almost unlimited. Which species is best to try? Is it easy to breed?
I ordered radish and carrot seeds online from an organic online store ( theaffordableorganicstore.com/ ). Next year we should be able to grow sunflowers for seeds. I would like to try some kind of peas. What else should I try? Are edible weeds suitable for microgreens?
Seeds from the grocery store would save money. Can you use every type of bean seed? Maybe popcorn?