Woah guys! I just came here to draw some spaceships and get some advice

Yep, I apologise for posting this in the wrong area. Typical n00b mistake.
What I am creating is not exactly pixel art, I am however wanting to incorporate some of the fantastic techniques that you guys use to make the work outstanding at such a small scale.
I don't want to get into a debate over what is and isn't pixel art, I just want to know what looks good and what doesn't.

Thanks for the comments Mathias, Gil and Rickfuzz. It is all appreciated.
I'm used to tough critism, eh Nick?

The image I posted initially was from my work PC (so, was probably a copy of a copy)... so there is a chance it could have been saved as a JPEG at one point, hence the artifacts.
Gil, if you would like to see the steps taken to get to where the graphic currently is, I'm happy to show and receive advice along the way.
PS. My dad can kick all your dad's arses!