Hmm...I had quite a few as a kid, but I don't exactly know how 'weird' they were...
I, like many others who have already posted, had an obssession w/ stones and gemology. I would even as far as geology.
I also was obsessed w/ my mother's, who is a nurse practitioner, medical and pharmacology books. I was especially interested in pharmacology, since I found the way that drugs interact w/ the human body, in order to cure or elliviate the symptoms of many diseases, to be fascinating. However, there was a big downfall associated w/ reading all of my mother's medical books... There was a six-month period where I suffered from 'disease of the week'! It was quite scary. In retrospect, the symptoms of most diseases are quite similar. I could always enough symptoms, in order to rationalize the disease at hand. For example:
* Fatigue - yeah I feel a bit tired (probably from the insomnia I had at the time, but I was not thinking about that).
* Headache - Yeah, I have had many headaches lately (I have a history of stress headaches and Migraines).
* Weight loss - Hmm, I do recall dropping a couple pounds (Umm...Normal weight fluctuation).
* I’m sure you can figure out a few of your own examples…
Buddhism was another obsession of mine....
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"Show me a sane man and I will cure him for you." -Carl Gustav Jung