Planes :D

[PaintYourTarget]

The nose is hideously uncurved and the cockpit really flat looking.
You have highlighted shading on the wings when it should be a darker colour - I presume it's meant to be flaps. Flaps are seperated with an indent, which usually collects a shadow, not light catching off it, especially in that position. They don't follow the curves of the wing either.
Props are isometric and the moving effect doesn't quite work. Try and have them blend into the grey motion circle by making more of the grey lines you added, but in the varying shades of grey you've already used. On the plus side, well done on remembering to make sure you can identify the red in the background.
The body looks very much like a block of red - I think some dithering and perhaps another shade of red might make it slightly more curved and metallic.
The crocodile confuses me.

[SkiitlesMan]

The nose is hideously uncurved and the cockpit really flat looking.
You have highlighted shading on the wings when it should be a darker colour - I presume it's meant to be flaps. Flaps are seperated with an indent, which usually collects a shadow, not light catching off it, especially in that position. They don't follow the curves of the wing either.
Props are isometric and the moving effect doesn't quite work. Try and have them blend into the grey motion circle by making more of the grey lines you added, but in the varying shades of grey you've already used. On the plus side, well done on remembering to make sure you can identify the red in the background.
The body looks very much like a block of red - I think some dithering and perhaps another shade of red might make it slightly more curved and metallic.
The crocodile confuses me.

Ever thought of looking at the good points?

Anyways Nice job! I like it

[GhostFace-]

redo the nose and are the sides even?

[PaintYourTarget]

Ever thought of looking at the good points?

Anyways Nice job! I like it

"On the plus side, well done on remembering to make sure you can identify the red in the background."

I did.

[Liberational]

I would lower the right wing and fix the nose of the plane, make it a bit more... pointy. I would say that for the alt you did very well, I always struggle with planes and cars so well done.

[Rockcuteman..]

ARghh How Do you do These alterations i wanna do one