Hi Steve,
I agree, all have different avenues of understanding life that cause us to have different perspectives. In the end, it is those differences that interact to further the understanding of each of us.
Steve, with respect, there is no loss of energy to someone whom you perceive to be of an opposite polarity. A person perceives a draining effect from someone usually because of an insecurity or weakness within the person who feels drained. They aren't really drained; they just loose some of their own connection within themselves, but it is their own issue; something they need to understand.
I used to teach people, including energetic body workers and people who deal with others on an energetic and emotional level. My classes were centered on becoming aware of energy within and around you in a tangible way; learning to move that energy at will anywhere you want; learning to free it up on extremely subtle levels, as well as learning the dangers and safety valves. When you do that work, and it takes years of hard work, it becomes clear to you that your energy knows no limits except those that you yourself impose on it. A person who learns deeply about energy learns that they are much more at risk of psychicly and physically harming themselves than they ever are of being fed upon by others.
Body workers then learned that clients that they perceived as negative or dark-minded, didn't really drain them. It was their own fears, sometimes a lack of understanding, and mostly a lack of confidence in the infinite source of their own subtle energy. Knowing how to hold and move their energy safely helped tremendously also.
It always comes back to us. If I have a problem with someone, I have ask myself, what don't I understand and where am I lacking compassion in this instance? I ask myself a lot

And that has a direct correlation on the energetic level
John
Paintings of British Columbia - John Rocheleau