This might just be because I woke up a little while ago, but a lot of them seem blurry/over textured to me.
So my favorites are 2, 8, and 14. I like the screenshot used in 2. It's interesting how you can't really tell what it is at first. 8 is simple, has a nice color tone and I love how the text is so airy looking. The screenshot used in 14 is cool again because of the angles in it.