When Ben came back from DrupalCon and mentioned how Drupal 8 was going to be built on the Symfony 2 Framework (and was talked about in this blog post here) I was beyond excited. I've used Symfony on the past (both versions 1 and 2), and by far it's probably my favorite framework to work with in PHP. I've used others, like Cake, CodeIgniter and Zend, and I've even created one of my own just for fun. And so far, nothing seems to be as light weight and unintrusive as Symfony is. It feels like it moves naturally with PHP code, without trying to change how you program an application.