Hey Lukas,
First I'd like to say that you've got some nice stuff on your page !
I like your introduction videos even though they are a bit too long. The Cryengine 2 walkthrough video was okay, but I got a little bit confused because I first saw your great screenshots and the video didn't look like those. I assume that you captured the video in "low details" ? I wouldn't do that ! capture it at high and put anti-aliasing at 4 or something.
I think your portfolio is easy to use and all screenshots are in full screen available, which is great ! my favorite project is your UE 3 Mirror's Edge map, I really like it.
Way to go !