Great topic, Ravenheart! Interesting links. I do consider myself an empath. Oddly enough, my husband and I were talking about some of this just a few days ago.
One of the biggest challenges I have faced is blocking things out and I've never been very good at it. I can't stand going into hospitals. I have to do it on occasion with ill family members, but I always feel like I'm on "information overload". It is just really an unpleasant experience for me. Large, crowded facilities, like malls or big, crowded restaurants are like that too; but where there is pain and suffering, like in a hospital, it is a little too much for me. Taking Brianna to the hematology/cancer treatment center in Houston, I have felt a physical sense of shock each time I go into it and I leave the place almost ill myself. We try to make the visits as pleasant for everyone as possible; eating at a favorite restaurant, a little shopping or a visit to the museum afterward, and that has helped a lot.
Back when I taught, it was a similar experience. To be honest, I was a good teacher, a very effective one; but I didn't get the enjoyment out of it that most people in the profession do (at least the good ones). I realize a lot of that was because I would become so caught up in some of the issues these kids were facing (I taught in districts were a good number of kids came from disadvantaged and/or disfunctional households). I came away from my job emotionally and physically drained. It absolutely overwhelmed me. Now, I take care of my own kid, I do my art, and my day to day life is much happier.
Watching the news is sometimes a real emotional chore. Watching September 11th, the reports of the tsunami, Katrina, missing children cases and I often end up in tears with these wild emotions I know are not coming from my own experience. Sometimes I just have to step back. I also cannot watch overly intense or violent movies or televisions shows (which disappoints my husband, who would love for me to watch Battlestar Galactica with him.)
There are certain people that I just avoid. The ones who I feel are in some way negative energies, I stay away from and boy, oh boy, that isn't always easy, especially when they are friends or family of my husband. I don't mind him seeing them, that's his business. I just don't want to hang out with them. I don't think he's ever had to use the line, "My wife doesn't like you because you are a psychic vampire", but maybe he should.
As for when I discovered I was an empath -- I can't remember not being. I had never heard the term used until a few years ago. In one of the links you posted, it said that the ability was inherited, which I believe from my own family. I grew up around it, so really, it wasn't until I started to school that I realized I was "wired up" a little differently than most people.
Now, I have a question for other empaths...Do you find that people have rather strong reactions toward you? Almost as if they decide immediately whether they really, really like you, or really, really don't?
This goes back to the conversation I had with my husband, which we've had many times before. Both of us have found that people have very strong emotions toward me. They either adore me or despise me and very little in between. I tend to be a very plain spoken person and a little "matter -of-fact" in face to face conversations. By this, I don't mean that I speak harshly to people -- far from it. I can read between the lines of what other's say, but I don't want anyone to have to do the same with me. In other words, what you see is what you get. When I sense a negative individual, my guard automatically goes up and I stay away from them and seldom am I wrong on their character. I'm interested if other empaths tend to draw these reactions out of people.