I always find it interesting to listen to Marten's ideas and thoughts. I met him in 2007 (back when he was CEO of MySQL), and have been following him since. I then met him a few more times when I moved to Silicon Valley. Direct, honest, great at delegating and empowering his employees.
Ideas on remote working and open source, but also shows that someone like him is still willing to help growing companies by being a guest, which is pretty cool!