http://galaxy.ansibleworks.com/
Galaxy is designed to surface the best roles by having a comprehensive system of ratings and reviews. I think right now people haven’t had a lot of time to dig in, but perhaps you would like to review a few roles?
https://galaxy.ansibleworks.com/explore
From each role’s “detail” page you’ll find a “review” link.
The system also features top reviewers, and makes it somewhat easy to explore all the things a user has reviewed.
For instance, click on my review tab:
https://galaxy.ansibleworks.com/list#/users/6
Note: we’re working on making various improvements to the galaxy beta over the next month, so expect many improvements coming. In particular, my user page currently only shows my last 10 reviews, which needs to be fixed up 
Also, if you have any cool playbooks, how about making sure they are converted to roles and uploading some content?