There's a lot of stuff in the wiki regarding the use of IntelliJ for core development and contribution:

JRebel & IntelliJ
Core Development with IntelliJ

But the corresponding page for Core Development with Eclipse has absolutely nothing useful.

For those of you contributing back to Liferay, are you using IntelliJ or is Eclipse not the redheaded step child it appears to be?

David, I want to try to set it up with Eclipse. Have you tried anytime?

Thank you, Luis

I use Eclipse just because I've used it for years.