If you didn't know already, David Karp is the founder of Tumblr, which recently sold to Yahoo for a whopping $1.1 billion in cash. Not bad for a 27 year old.
If you've ever used Tumblr before, you'll know of its minimalistic style and very easy to use system. As expected, that minimalistic style is also found in his home. However David is not the type of minimalist who likes everything to be white and completely neutral - he has a very industrial taste.
With David being one of the biggest tech entrepreneurs out there, you'd expect his home to be filled with screens and cool tech wizardry. Instead his home is very analog. He says he doesn't like screens very much - odd coming from a person who built a service that requires a screen.