Thats 2 factions your talking about there when you say human(plus you HAVE to remember the TEC converts civy ships into military on a regular basis).

Don't bother with that argument. It's been stated and refuted (in my opinion) too many times to mention.

Most TEC ships are either converted civilian trade ships(like all their cap-ships minus Kol and Sova) or desperate designs based around civilian ships, built to somehow stop the Vasari(like Kol, Kodiak and Garda). Only their Gauss Turrets, Sova Carriers, Javelis LRM Frigates, Hoshiko Robotics Cruisers, Fighters, and Bombers look like purpose-built military machines without any civilian background.

Most Advent designs look like they are purposely trying to make you look at them, hence being gaudy and over-curvaceous(like the Progenitor, Guardian, Illuminator, Disciple, and Defense Vessel). The others(like the Radiance, Crusader, Aeria, Fighter Drones and Bomber Drones) look like they were more focussed around the engineering, with looks being a secondary but still important consideration.

The Vasari are aliens and there is no point telling why their ships look as they do. Some things, like the Enforcer's large Wave cannon and the Transporter's hangar bay stand out, but the rest is completely random.

Actually, I think the underlying motive for your post has got some real merit to it. Some of the designs are ugly when you ignore that they're supposed to fit in the game's lore. What if ships changed appearance if they were upgraded? Ok, so you click once to get the ship model and now you can start building it. What if there was a second extremely-expensive level to that research where the actual ship model itself got upgraded? Otherwise, what if after doing several/all of the weapons upgrades, the ship changed appearance to look upgraded?

Just a thought...

I think it is okay that spaceships do not look like things built to move in water but
in vacuum Some of the models might be improved with a few more details or structures, but overall I think they are doing fine

Yall have a good point but aestheticlly pleasing a few my cramp some1 else. It would be cool to make them look leaner and less blocky. But i expect those types of changes to come in the Xpac with a single player IN-DEPTH campaign

Or more accurately, Treads   

I have to agree with the OP. Being an artist and designer myself, if I was the art director on this project I would not have allowed some of the designs they have currently to pass through to final. Some of them are really really bad (but not as bad as the designs from the beta's and alphas). Some of them are really good. The KOL is fantastic for example.

It's not easy to come up with good designs that are aesthetically pleasing yet also have identifiable silhouettes in comparison to all the other units. I wonder if they did silhouette tests before moving forward with a design.

Aegis Drone Ship while highly identifiable is quite fugly. I can only see it as the flying metalic space snail.

i dont like it.....yes space snail.

How about a remodel on the Kodiak's main gun turret? The big one on the top? That thing looks ridiculous. It looks like a big turret, but it isn't! It is a fixed gun! I think a longer, fixed weapon, along the whole dorsal region of the ship would look cooler. Kinda like a shoulder mounted cannon instead of a WWII German Tank turret.

I'd have to say that the overall most 'Military' looking TEC ship is the Sova Carrier. Damn thing is just so sexy.

I think Kodiak looks like a tank because that's what it suppose to be - a tank in space. It suppose to make you feel like you're looking at something that's hard to damage and packs a very big punch. Making it longer and "leaner" would remove that feeling... there is a reason why tanks don't look like they do.