Yep - I'm right there with you. Just as I shave my head, grow it back into various styles and then shave it again - I do the same thing with facial hair. But I don't often go clean shaven while bald because I simply don't like the way I look. When I'm bald on top, I need some facial hair or I just (at least in my opinion) look goofy. But when my hair is any longer than a #1, I like to go from full beard to clean shaven and everything in-between.
One thing I haven't tried, but may do later in the fall as the weather cools off - is shaved head and full beard. It seems to be a popular new look.