Eris: Cool, but looks more like a fighter/bomber, though I can't see it as Vasudan. (Would love to play with that mesh though, the front of it looks a lot like something for a VTOLish transport I tried to make that would have 4 engine struts like the two on the front of that but failed.)
Gar: Front looks nice and bulky (nice for a big ship) but the struts going to the engine pods look too delicate and in the first pic the bottom 2 don't look like they're attached at all due to the shadows and indents. Cool otherwise though.
Gar pic 5: Look! It's a man in a space suit!

Seriously, from that angle it does kinda look humanish. (If you forget about the lower two engine pods and the spike comming out of the "back," neither of which are very visible in that pic.)
As for the truck:

Um. It's a truck.

Rhino: Interesting design. And I can see another humanish look in it's 5th pic, though it's not as noticable as the Gar.

The atmospheric ones with the fans are, in a word, odd.

The Dragonfly looks like a helicopter that was retrofitted with that engine thing, replacing the rotors. That engine thing (at least I assume it's an engine) kinda looks like it was tacked on as an afterthought. I'd probably have made jet engine like pods built into the hull next to, but behind, the cockpit. Nice hull design, though the side pods could use either good texturing or some detail. (I assume they are weapon pods.) And I have no idea what the "Orca" is. Aside from the whale.

.oO(Hmm. Airwolf in space. Now there's an odd idea.)
As far as the Shivan ones, a lot of them looked like insects to me, which seems odd to me. But I can't say I'm fond of Shivan ships, even the ones

made.

The back of the Yali (or at least I assume it's the back) reminds me of the front of the Rakshasa. Kinda hard to get a good idea what that one really would look like for me. (I'm not too good at picturing a 3D model from still images, at least when it comes to complex models like that.

)