I've always loved the tech stuff. Those insidiously mind-bending space-scapes of tech nothingness that some people seem endlessly capable of creating. I've made a couple of them, but like many things, I don't dedicate enough time to perfecting once I've done it once or twice. Still, I have to hand it to these guys.
This site, whether it's a design house or just one guy, I'm not quite sure, but the visuals are just stunning.