PyCon (https://us.pycon.org/2015/) is always a blast. It's large, but has an amazing sense of community. You will find at least three or four amazing talks each day, on a variety of subjects. The posters area will expose you to all kinds of cool academic and other projects. The Expo Hall is always full of hip companies (giving away lots of great SWAG, of course).

I guarantee you will leave inspired.