[Suicide Junkie]

I like them. You've kept to the simple cubes & spheres for the main ships, while still managing to make each one unique and identifiable.

I have two suggestions for you:

1) The light cruiser seems to have its texture tiled 2&1/2 times, and it looks odd. Considering the scale on your cruiser, compressing the texture to get three tilings would be good.

2) There is a lot of glare coming off of the one upper face of all of your bases. Can you shift the light source or the camera to reduce that a bit?