The first thing I want to say is that I love the creativity on the thing you did to the right of the render (with the circles). Not sure what that technique is but it's quite inspiring to me.

I also like your choice of colors. the left background does it well.

I have no idea what the text is about, but it matches the theme and color of the sig so no gripes there.

One thing I couldn't help but notice: there seems to be a light source over her shoulder, and it does harm to the already satisfactory light source above.

Also, like Monroe said, there's too much 'depth' and I think the background is blurred just a bit too much. I can sort of tell that the background represents a high-class place, therefore adding glamour to the render, but just a tad more focus couldn't hurt.

Back to the lighting, a little darkening down the bottom of the focal could do wonders, I think.

I see a lot of brown. Brown isn't a bad color, of course, but it's awfully plain.

And personally, I don't like the color of the border. Nothing on your part, just personal taste.

last thing I wanna say is that it's just a bit too radiant. A lot of bright colors and the only real contrast is light brown.

Overall I like this style, and I am looking forward to seeing more, if you enjoyed making this.