1 2 - nice shape: it gives a lot of weight and mass. Great for a huge Battleship. 8 - I love the bottom part in the middle. I Imagine some Anti-SUrface-Railguns for planetary bombardement. Although the front and backside look to much like a fish. 9 - nice shape. SUggests some speed and manoeuvrability. Maybe try to mix 2…
I think the following are pretty promising: 1 - the least alien-like and most functional design 17 - looks nice. The left side (I guess it's meant to be the front) reminds me a little of the megathron from EVE. 8 6 18 - but I would change / leave out the strange thingy / handle on the right end. All in all most designs…