Yea blue is more in the coloursheme of the navy. So blue it is !
About those lasers. It's funny I though that was part of the trails let by the wing (I was sliding backward ready to thrust).
Something that make me think : Those trails should not exist. A plane leave trails of wind in the atmosphere. But in space : there is no atmosphere, no wind so there should not be any trails from the wing. We should only see the trails of the engines.
For the texture I'm a bit limited. I used the effect Rock with infranview. I wanted a bit of relief. I'm not a expert in all design and graphic art so my skills are limited too.
Maybe you know a program free better than infranview ?
I will try other sigs because I know that you can take off the background in game to see only the ship on a black font. Now I try to figure out how to add different graphic around the ship.