Okay, I like certain aspects of the designs and if completed more and regulated it could make for a nice design.
My thoughts:
Take the header and menu from the second design
The content area and light-ness from the 4th design
The defined block-nature of the site from design 3
and the footer a mish-mash of designs 1 and 4.
A few general tips, don't commit texture/colour crime, by that I mean keep to as few as possible.
Obviously downloading lots of images etc. slows page loading time, but more specifically it makes the site look cluttered,
complicated and difficult to read. Whitespace is your friend! (I like the first design for this most, and the 3rd and 4th show it as well)
Also consider porting things to the web, and how it'll be done: for example the vertical headings arn't good for this.
Colours: Use a defined colour scheme. In my early designs I used to use too many colours that didn't work, and I like to think I have overcome that now. In the second design you do this well in some parts, you have the red and black combo, and the yellow over the top works well, except in the bottom the greens and blues don't work well, try using more greys, and generally more whitespace, don't just cram in images (back to an earlier point).
Also, if you're using photoshop, a general tip is to define styles for h1, h2, h3, h4, p etc. so you can just click to apply them. This means you dont get any discrepancies in the colour picker (because it isn't always right) and it helps to keep the styling the same all the way through.
Finally, I think you have a thing for web page backgrounds as images/textures. This can work well, but make sure it frames the content, you use some very saturated images and it can distract from the content (designs 1 and 5) and when styling text, please remember you can't do very many fancy things with TEXT (images are fine, for logos etc. but NOT for dynamic content, and yes. even with CSS3 and javascript tricks, consider compatability!)
tl;dr:
Great initial designs, check your colours (adobe kuler is a great tool), don't overdo the textures/images.
My $0.02.
I can't wait to see the designs when they are more complete :)
Oh! Finally, use lorem ipsum (it helps look at the design and not the content :) )
OH! And themeforest is brilliant for inspiration ;)
Hope it helps, keep it up!
- J250