Ask yourself this, what is it that even makes you care?
I don't know really.
I think it's a combination of my interest in human psychology (which came from studying it at college/uni), and also my fascination with anything paranormal or the occult.
Ghosts, psychics, astrology, religion, alternative medicine, ufos, cyptozoology (i.e lochness monster, rods, bigfoot etc), conspiracy theories (JFK and the lone gunman?, 9/11 inside job, the moon landing hoax etc)
I love it all.
I love being a skeptic because I can sit back and not be tied to a particular view point because it makes me happy or comforts me. I can take a step back and all I care about is truth. Even if the truth isn't interesting I would rather live in a real world.
I think at the root of all this stuff is the desire to get closer to the answers to serious damn questions and seek the truth in all situations. I love pursuing truth whatever the topic, but particularly stuff which is interesting or has an impact on my life or my fellow brothers and sisters.
Irrational thinking is dangerous. About somethings less so than others.
http://whatstheharm.net/Take homeopathy for example. Most people might not realise that homeopathy in summary is taking a single drop of an 'active' ingredient and diluting it in water over and over again, like hundreds of dilutions until there is not one single molecule left of the original active ingredient. So homeopathy is literally nothing. This homeopathic 'medicine' is funded by the NHS over in the UK. Fortunately it's not funded by governments anywhere else in the world and it's looking like it won't be here for much longer. But at the moment you can buy it in Boots pharmacies with a label on the side explaining that it will have no effect and in some NHS hospitals (although it's mostly given to terminal cancer patients who take it just for placebo).
This is insane....but why does Homeopathy still exist anywhere in the world?
The answer to this question is very long and complex. You could replace homeopathy with any such irrational belief or magical idea. So much controversy, so much bullshit. I don't really know what can be more interesting than taking an interesting belief, idea or theory and looking at them critically in order to get to the bottom of it all.
I hope that answers your question albeit in a long winded way!
;O