Hope you wont get mad, Im gonna give you some advice. You dont have to take it of course, its just my personal opinion

Theres just too much going on. I like how you've tried to centre the attention around the render using c4ds/brush strokes or whatever, its good yet overdone. The colours are ok yet they contradict each other,especially the dark blue background. It clashes too much with the light pink colour you've got there. Next time try tone down on the use of c4ds etc and try and keep to a colour scheme when making a sig. These are just my opinions and you may not agree with me but hey, CnC is what makes you into a better GFXer

Goodluck in the future. I know you will get better