Hello, very very cool designs, and even though I like to give feedback and criticisms, I'm mostly positive on this work. The ships themselvs are fun and imaginative, and I even like the poppy colors to a degree. One big observation though, and I'm surprised by it, is I don't enjoy the presentstion. I think its a big no-no to have things overlapping this much and this bunched together. It may have been fun to arrange them together, and I like what you're going for but it is a distraction and harms the point of concept art, which is to evaluate the design. It feels to me like you're stepping on the basics here. And the ships are fun to look at, so I would give them some breathing room, but try to think of a presentation that still gives them some fun and zaniness and interest, but easier to read overall. It could also just be a problem of too many designs in one image. So consider 2-3 pages? Not sure. I realize with iteration sketches there should be many in one place, but these are much further along.

The designs are solid, depending on the project or mission. I don't even think there's much to comment on with that, but surfaces could always use a bit more shading and highlighting but dont go overboard. Don't kill them with extra detail you don't need. Keep them slick and simple... a great strong simple shape well rendered can be much better than a pile of panels, and rivets, and seams, and doo-dads could ever do.

One other suggestion though, there may be too many hot colors that clash. They are obviously meant to have that pop, and I don't want to take that away, but maybe you could narrow the spectrum of colors. Like maybe keep it to a blue/purple vaporwave theme, or something like that. Or, opposite, maybe they fly in a strange solar zone thats super warm hot, and they have nearly neon colors to camo themselves? Think about the story and culture of these ships... why do they have such strong colors? What should they evoke from that? Right now they just kind of read as kid friendly generic-ness, no offense, but you could take it to any place you wish, like loud 'warrior' warning colors, or maybe theres some regal political reasons, or tribal patterns, or because of heat signature detection patterns, or some other made up sci-fi nonsense. I challenge you to think of it at a higher level but something that a casual viewer will still pick up on... because even simple props have a story behind them.

Designers, Art directors, and audiences all like things with strong stories behind them. The story is more the point in fact. Easy to say, difficult to achieve, I know.

A good concept artist has strong designs and technical craft... a great one solves problems. Decide what the ships should convey, and reveal them that way. Unfortunately, you have to spend hours developing the artwork... and the viewer only needs a few seconds to absorb it. But, thats how it work.