Following much discussion, we are changing the default color map and styles in the upcoming 2.0 release!
The new default color map will be 'viridis' (aka option D). I recommend everyone watch Nathaniel Smith and Stéfan van der Walt's talk from SciPy2015 introducing the new color map and providing an introduction to the math of color perception: https://www.youtube.com/watch?v=xAoljeRJ3lU
We are soliciting proposals to change any and all other visual defaults (including adding new rcParams as needed).
If you have a proposal please create a PR or issue with the changes to `rcsetup.py` and `matplotlibrc.template` implementing the changes by August 9, 2015 (1 month from now). Do not worry about updating any failing tests.
At the end, Micheal Droettboom and I will decide on the new defaults.
A 'classic' style will be provided so reverting to the current default values will be a single line of python (`mpl.style.use('classic')`).
Please distribute this as widely as possible. We only want to do this once and want to get feedback from as many users as possible.