Ok, you got the right attitude about learning. 
People here really are amazing. 

Swordfish: Indeed, you are correct about the color. Might I suggest a base color of RGB(198,47,29)? Also, the front can use some work, for as of right now, it seems twisted instead of sharp and pointy. I suggest you take out the, err, diagonal metal glares(?). Overall, this ship seems to need a darker palette. The shadow in front of the cockpit can be prolonged and smoothed out with more shades. The, uh, rocket(?) in the back seems to have some sort of alternate light source, and it'd probably be good to keep light shading consistent.
You also need a rocket "hole"(?).

Skull: Texture is nice. Only thing I can find is to bring out the lower jaw a bit.

Agreed. Appears to be shrunken down with anti-aliasing, and then, color-depth reduction'd. After all, those blue pixels in her hair look oddly out of place...

  You mean my history teacher lied!?!?!?!?
Damn! Wasted 4 years of High School!
By the way, I really like your uh... Amphibious Vehicle, Bryan teh Graet. Reminds me of Transformers...
Pixelaro, I never seen it before, but speaking on techical terms, that ship is kewl. The cockpit glass seems pretty good to me, though I don't think you need that many light glares. Just one on the surface and maybe four adjacent darker shades underneath if you have another layer of glass.

Use Imageshack. Most of us do.
Anyways, most of us are seemingly harsh with the C+C, but really, we're trying to help people improve.

Anyways, I have to say it's pillow shaded, which is basically shading with a light source assumed to be in between the viewer and the object. In most cases, pillow shading is bad. Also, the red is fairly bright and neon, and it'd be nicer if it was a bit less saturated.

I would make an edit of it, but I'm out of time. 

Anyways, keep trying. You'll get better with experience.