There seems to be increasing demand for changing default theme in phpMyAdmin. Well the obvious question is which one to choose :-). There are currently 3 themes compatible with 3.3 branch, what is still far away from current master, however I don't see that they would mean big improvement over current ones.
Maybe we should just make some contest for new theme?
Anyway if we decided to change the theme, we will still get complains from users that we did the change. At least this is what I remember from last attempt to do so several years ago :-).
I'd like to see a new default theme as well! Here's a theme I just submitted to the phpMyAdmin team and created with my 3.1.1 PMA install.
Available on SourceForge:
https://sourceforge.net/projects/pmahomme/