I know very well Django, has created many sites using it, but lately, I try not to use it.
Instead Django, I use Werkzeug + Jinja2 + WTForms.
I work with databases: MySQL, PostgreSQL, MongoDB, SQLite. SQLite to use mainly for desktop applications. MySQL - only if the customer insists on this. The others - depending on the tasks.
I like to develop software for the desktop. To do this, use GTK+ and Qt.
For source code version control I use Git and before that Bazzar.
As the operating system I use Linux on all my computers and servers.
My favorite web server is nginx. I know very well how to tune it.
P.S. Added this information to the page about.