Oh how cool!! I really like some of those designs.
I also love the look of flooring done out of reclaimed lumber, like from old barns. And I wouldn't want it myself, but I've been in a (crazy fancy) condo that had leather flooring in most areas and cork in the kitchen. The leather was actually really nice to walk on (in my socks, no shoes allowed in that house!)
There are so many interesting and unique options out there!