Aviaturgus

Good start. Nice photos throughout, the nav on the left is clear, yet overshadowed by the main content (on purpose?).

The design is pretty blue and shiny, a common look for websites. Might try adding another color or two and going for a non-shiny treatment if you want this site to stick out from other sites.

Its generally not natural to read center aligned text. I'd suggest you left align all the links under the images (as well as the bold text), and as what Szymon has mentioned, remove the "http://". A tad more bottom margins between each links too.

There's also a lack of any footer element, which is as important as any other area of a template, and often taken for granted.

Links under each category are a bit too common. Maybe you can add some style to make 'em a bit original. I would also skip the "http://" part - it's obvious and makes the link hard to distinguish.

Header is a bit too "sparkling" if you know what I mean... I would also consider replacing drupal site-icon.

Typo colour inside catalogue could be dark grey instead off solid-black.

Good use of Drupal though. :)