Well it's good to see that you're doing more than just copy/pasting to make your backgrounds, but try to do more than just layering fractals.
When it comes to having a pop-out effect, you always want to make the render look like it belongs to the background, as well, and I don't see that in your tag. Keep working on that.
Overall (on a ranking of Novice<Moderate<Inter<Semi<Pro) I'd rank you as Novice, just learning how everything works together. Keep at it and you'll get better in no time.