Especially changes in the default plot styles: http://matplotlib.org/2.0.0/users/dflt_style_changes.html http://matplotlib.org/2.0.0/users/dflt_style_changes.ht

Especially changes in the default plot styles: http://matplotlib.org/2.0.0/users/dflt_style_changes.html http://matplotlib.org/2.0.0/users/dflt_style_changes.html. No more "good old 90s" as a default color scheme (#0000FF, #00FF00, #FF0000...). And perhaps also - no need to load http://seaborn.pydata.org/ http://seaborn.pydata.org/ each time, just to patch it.