' Wrote: Get rid of the Animation and save it as .png. .gif has bad quality, you can notice the noise. If you want to keep it animated I suggest using animated .png's.
Same as above, get rid of the animation. Problem here is the jagged edges on the letters. Use Anti aliasing on the text and get rid of the bevel & emboss.
This one looks good.
Lens flare is a no-no. It looks ugly and doesn't fit. You could also do a custom space background. I'll link a tutorial. Another problem, the drop shadow at the bottom is cut off. I know it's in my signature too, but it doesn't look good.
The background is ugly as hell. Don't use coloured noise. And there also is too much noise.
This one looks OK, though it could use tech brushes.