Has anyone ever stained exterior brick?

Yes, it does. Thanks a lot. Found a pic of what I want too!

If I am understanding your question correctly, staining only the ones you are interested in darkening, yes you can.... it's a subtle difference but certainly a difference, and if you like some but not others, I don't see any reason you can't. I also on my rocks, and would assume bricks work the same way.... if I wanted a deeper color, I either put more than one coat or even mixed colors..... I didn't wait for the stain to dry, if I wanted it deeper, I just went over it right there... if you have ever painted with water colors, this is the same concept.