A complaint might be "Oh, I HATE what you've done with the feathering on the camoflague!". You have to consider these as feedback. A lot of it is very important, especially for beginning skinners.
There are certain qualities that are important to a skin. For example it won't be accepted if it's not 1024x1024 from the get-go. Think of this forum as a peer review. We're all seeing blotchy/blurry details on the screenshots. Now that *could* be just that your in-game resolution is set very low, or it could be that the skin was made too small and is being scaled up in-game. That's an important detail.
Another issue that nobody has mentioned, because this is the first post and we all take it as a work in progress, is the weathering and wear/tear of the skin. I'll just point it out for an example. My first 109E and 110C for BOB'04 didn't make it in time for the scenario because I thought I liked them clean. I got a rejection notice for both because they were too clean. In fact they had nothing but solid colors and panel lines (and a few smoke streaks). I quickly came to appreciate subtle shades in the areas of solid paint, the breaking up of the monotonous solid colors with worn paint and what-not. Your Ju88s, for example, aren't ready to submit because the color, because the texture size, and because the lack of "weathering".
Please don't consider these complaints, rather observations. We've all been through that phase. Over time you get a feel for things, but at first you're going to need other folks to point things out to you. We all want the best quality of submissions for HTC to review, and we're generally a friendly lot. We'll try our best to help you along. That's what these forums are for!