First one's text is pretty hard to read. I know what you were trying to do, but placing that white layer of text under it takes away from the effect.
Kind of ruins the flow. Everything else looks nice.
Second one is pretty solid. Background works well with the render. Text looks pretty nice. I think there's a problem under her elbow (sticking out), that brush doesn't cover it and makes it look pretty strange. Also, for the boken brushes on her face I wouldn't cluster them like that- it's just strange.
Third is pretty cool. Nice smudging. Poor color choice. The render has nothing red/dark on it and the colors clash. Kind of seems like you slapped the render over everything, there's nothing to give it depth. Lighting is also inconsistent with the render, you've got it on the top and left and it doesn't give a clear focal point. Not to mention the way you did the text is pretty bad imo.
Overall, I think you should work on the placement of renders. They're all on the center. It's typically better to see if they work better on the left or right.