Idea provides several L&F choices. One of which is called Alloy, which is based on the Alloy Look and Feel from Incors.com (http://www.incors.com/lookandfeel/).
Everyone has their preferences. Choices are good.
However with the last EAP build (3353), the Alloy L&F has been changed substantially. So much so that some people don't like it.
So I reported a bug (http://www.jetbrains.net/jira/browse/IDEA-2327?page=comments#action_31273) requesting that it be changed back. The response I got is basically that you can't please everyone.
There is however an alternative that can please 'more' people. Provide two L&F's: One called "Dark Alloy" (what is currently called Alloy) and one called "True Alloy", which would be what we had before and quite a bit closer to the true Alloy from Incors.com.
I have created a New Feature request for this. If you care, please vote for it here: http://www.jetbrains.net/jira/browse/IDEA-2387