Yes, I'm 100% sure that some people slip into other states more easily. As you can see from what I've written, the guy who tested me with EEG equipment noticed that immediately.
With regard to picking up other feelings, I don't think that's the brain (although it might be). I think we have an electrical field around us, and as it comes into physical contact with someone's else's electrical field, we meld with them, and the just as our physical body is connected to our brain, so our electrical field is connected to the brain. I think the brain then translates what our electrical field has picked up.
Of course, if you tell anyone that I said this, I will totally deny it! I will lose all my credibility! :)