Liking that banner, as well as the cracked text. Those two are by far my favorites, as they seem to be the most eye-catching. The second image doesn't flow at all (imo) and it contrasts the background and those lines on either side, far too much. The 'Cell' looks a little too busy for me and again, the background doesn't flow at all.
You've done great and I hope to see you improve, as I'm sure you will do. I look forward to seeing more of your work posted on here at some point.