Dear Rainbow:
I haven't exactly seen auras, but I have always been very perceptive about people and how/what they are feeling. I can see thoughts (sort of) sometimes. Lately, I have been noticing a clear and wavery space around people's bodies from time to time. I think it is the aura but it is totally without color (so far!) This perception hasn't proved particularly useful - so far - but it feels like it is in the very early stages, so who knows!
As far as scanning the body is concerned, I can sense differences in the energy as I move over a client. Often, however, I am most sensitive to the energies in the aura after a session as I "sweep". They can feel hot, cold tingly, hard, or static"y". The good thing here is that I notice things that need more work and can sometimes remove or alleiviate the congested area before I finish. This is something that is still developing for me.
Hope this helps! Blessings, batwings