alright, because I'm a nice guy and, apparently, have nothing better to do, I'll take a look at all the ships. Here are my thoughts on the Hiss Nebula.
Anata - Again, way too much section 21. The general shape of the ship isn't terrible, but because you insist on not combining those 21s with other pieces, the end result looks terrible. There's no cohesiveness on the interior. There's no impression of depth. There are also too many small gaps in the hull. The overstretched drivers really don't look good. The tachyon/plasma cannons are cool looking though, but you need to be consistent with them. On one the plasma is stacked on top of the big pulsar, and on the other it is reversed, stay consistent. You should add the aegis to the engines after you add the thrusters. The aegis will cover up the ugly thruster module.
Black Cobra - There are quite a few mirroring errors here. Depth errors, a doubled-up main gun, pieces being off by a few pixels. You should stack aegis modules on top of each other, especially on a small ship like this. As is, the hull is way too crowded with weapons and modules.
Black Viper - I think there's too much empty space in the middle, but that's about it. This one is fairly basic.
Boa - uhm...yuck. The focal point of the ship is a massively stretched pulsar. That's hideous. It looks fairly cool while firing, but it's not good while just sitting there. If you shrink the pulsar widthwise, stretch it out more vertically, and up the clip size (I upped it to 70), you can achieve a similar effect, but it gives you a near invisible weapon that you can then hide underneath the aegis (pictures to demonstrate below). You'll also want to center the pulsar, it is significantly off-center. Also, why is there only aegis on the first two sets of pink sections, and not on the last one?
(firing)
(note the tiny pulsar)
Conda - mirroring error on the engine. Not a great ship, but not awful either.
Constrictor - not a bad ship, really. I think the middle part should be the same on all sides, so it can be symmetrical on both axes (though it's not bad this way). You have another doubled engine due to mirroring.
Fang - Mostly, the same complaints I've had for everything else. Interior is jumbled (badly), too many small gaps in the hull, thruster modules should be under aegis, overcrowded hull.
Gorgon - No...just no. There's no conceivable reason why that external ring should be all sec 21s. It's just lazy, and it looks terrible. The booster modules look bad since they can't be rotated. If you want to use them, you should probably stack them in the middle. The section 24s on the end of each arm are slanted wrong, and it's very noticeable. You have mirroring issues and some depth issues.
Jorumgard - every other complaint I've had about your ships exists here (namely, terrible interiors and weapon/module spam obscuring the hull). However, you've then compounded the problem by using RIDICULOUSLY stretched sections. Look, if you can't see what is wrong with that then I can't help you. The blurry lines, the loss of detail...ugh. Don't stretch pieces like that...ever. In fact, as a general rule, especially if you're newer at this, is don't ever stretch pieces, use combinations of sections to get the shape you want. It's more detailed and looks way better. This ship is just...not good.
Naga - some of the problems I've addressed already exist here, and they should be easy to spot, but on the whole this is much better than most of your other ships. I think you could do a bit better job coloring it to give it a sense of depth, but the section usage and weapon placement is much better here.
Most of these ships have the same problems I've been mentioning above, and I'm running out of time, so I'll go through the next group quickly.
Orochi - We have a word for ships like these. We call them "penisbricks". Penisbricks are not pretty. This thing is too blocky, too long, and just all-in-all pretty ugly.
Quetzalcoatl - Look, it's the Boa, just...bigger. Is the bigger Boa better? Not really. Same comment as with the Boa, fix the gigantic, ugly pulsar.
Ragnarok - I think it needs a bit more section 21.
Raja Naga - Better. Still overuses section 21 in areas where it really shouldn't be used, but better. Hull isn't as cluttered as many of your other ships.
Selathin - I don't even know what to make of this thing. It's very...odd. The design has promise though
Slither - Too much clutter. Somewhat better section usage though. Not a bad overall shape.
I'm still short of time here so I can't post any big screenshots of my entire fleet. 
Hopefully somone out there will be kind enough to do it for me.... (Rises flame shield) 
Still, if I get bashed for it, that's too bad for me. 
Dunno if that's a good thing or a bad thing.