Nyaan nyaan. Good start for a first banner, here are some tips you could grab...
First banner:
-font change could be more awesome
-You could give some additional glows, by using the blurred brushes, and changing the color!
NOTE=A great basic banner, brushing can fix it, you could start some blanding layer experiements!
Second banner:
A -bit- boring,but at least you learned new style. you could change the love with other icons, that'd be perfect. The images are blurry, you can find some renders at dA, right?
Third banner:
Better. but since the fonts are resized, i cant say that's perfect for you...
By the way, i like the render. try to use gradients!