Alot of nice pieces in this page... i'll try and provide feedback on all the ones i see.. (unless i've already given some feedback and have nothing further)
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Coaly: I agree with the comment on definine the gun more. I think your shading begins to get too similar and not all things have soft shadows. Right now the sweater and gun both feel soft. I would work on looking at how hard the light and shadows are on metal surfaces. Mindchamber's bot's seem to have alot of hard shadows and highlights where you could draw some inspiration from.
In regards to the figure, i like the bendy aspect of it, i find that the left arm has a corner thats too sharp where the elbow bends and it looks out of place in comparison to how elastic his other limbs are when they bend. I'd experiment giving that bend more curve so its not such a sharp angle.
Voidshatter: Looks good, I think the feet look a little weak. I'm not sure what exactly they need but they look like they have too plain of proportions. I'd look at how Mr. Incredible of the Incredibles is built in his proportions.. you'll notice it has a comfortable top heavy feel to it. Other than that i think its comin along nicely. The left arm looks a little wierd in the way you have the muscles there, I'm going to assume that was intentional though.
danomano65: Nice tank. The tankman is also refreshing. i think my only suggestion is to not have your tank be too horsey and chunky in its line quality.. you have some really nice details and attention to detail on the tankman and the tank is looking a little out of place. If you intended to continue adding details well then ignore my comment lmao. maybe you could incorporate a little more color into it.