Obviously my critique is just my opinion.
But yeah the gallery images, have a border. And using color from your logo, I added :
.gallery > li > a > h5:hover { color: #d35750; font-weight: 600; margin-top: 20px; } {
}
Im not sure if this declaration is already in your css, as I am now not in the office.
Personally, I try to steer clear of images, esp: shades and backgrounds. Whilst they look fine.. its an extra server request that really is it worth it ?
But yeah spacing is seemingly biggest issue, so perhaps play with diff versions, and put up a few examples to gain some voting and additional response.
Regarding the gallery I think you need to focus more attention on UI , because your divs are so close together when transitioning the mouse across the different images etc, the cursor has little time to change from pointer, so more of an effort I feel is needed to focus users attention on current viewport.
Aside from that as I said I am no lover of dark websites, but should be good.
One last thing, you have different categories: tutorials, jquery etc. Do away with the text (jquery) in the description and add some kind of graphic on the image?
May give it some extra zing.. not 100% sure. I hate typing stuff to explain an element when a small icon ( spritesheet works best ) can accomplish the task faster and with greater fluidity