Lol, I think you are a bit biased, since everyone on this board has dark sigs, it's not really that bright. Oh, and I like you entry for sig of the week Marine, 9/10.
First one 7/10 Seconmd one 9/10 I like Idea, backround is nice although you cant really tell what it is, but still looks good.
the render on the first one seems strange and I don't like the scanlines on the second one, coloring could be better on both 6/10
Top: 8.5/10 Bottom: 9/10 Top one is abit dark, but it looks really good, and the bottom one I just love
Talk about changes Love em, both 9/10 for both! And the left one has an amazing render, nice looking pixel stretch too.
Like the first one a lot 9/10 ... very colourful but works well ... however the second one 6/10 good BG and the colour blends well with the Render but the Render seems too small or is left out of the focus ... pixel text is ok but the other text is nice. Overall the sig looks too plain.
The render is abit overblended to me, can't really tell what's goin on, but it does look good ^_^ 8/10
Both very nice, but i just noticed that you used the same grunge-background twice, maybe try some differenct backgrounds too =) 9.3 / 10