I've seen the preview image with rage!Guy but has there already been an 'aura shot' of him identified red? If so can someone point me at a scan, or post if necessary?
I kinda take the auras as the emotion that drives a person. And all of these emotions have the capacity to fuel one another save for death. Depending on circumstances, emotions are subject to change. They're also complex on occassion, like Kyle for instance.
So, personally I don't have a problem with Sinestro being 'fear' because his fear that the Guardians (and everyone else for that matter) are fallible/capable of being corrupted/whatever is driving his willpower to expose those flaws.
But then, I'm probably way off track. I don't even care as long as Guy kicks ass and I'm entertained.