The gold standard of embeddable badges is shields.io. They currently support three styles of badges:

• plastic (the old default style)
• flat (will become the default style on Feb 1, 2015)
• flat-square

Some services like travis-ci.org have already switched to the flat style.

Mixing badges of different styles results in ugliness.

It would be nice if embeddable-build-status-plugin would allow the user to specify the desired style using ?style=flat or ?style=plastic.

It would also be nice to switch to the flat style as the new default on Feb 1 2015.