A house made almost completely of Obsidian! I gots lots of nice things for you to try! :D *NOW WITH A CACTUS AND CANE FARM*
This is my first house I made in Minecraft. Not much really. The house is made completely out of Obsidian. I have a bunch of diamond, gold and iron. I have 3 beds, a couple music boxes and a sexy hot tub. Yep. Really great. Install in C:\Users\YOURNAMEHERE\AppData\Roaming\.minecraft\saves if you have windows 7. I don't know where for mac or the others.
*UPDATE* Added a little more and now I have a dog. With an awesome little doggy door in the back! Yeah!