I think the first 2, like you said are under-exposed on purpose, and that certainly can be appealing. I think that is done so often, that it needs to be REALLY good to impress a lot of people. That being said, I would much rather look at those than the baby with a big bow pics.
I like the lines on 3, I think I would LOVE that pic maybe 15-20 minutes later when the sun was down more, so it wasnt blinding. Did you stick around for that? Looks like there might have been some nice orange colors with some nice clouds.