I'm not sure I believe in all this, but it sure is interesting to read about all your experiences. I have a few more not-really-reincarnation-things, all of which probably have mundane explanations:

Some times, when she was about three years old, my niece would occaisionally babble in what sounded like German, which we thought was odd...

Quite a few times, I've seen pictures, ones that I haven't seen before, of musicians from the first half of the 20th century, and instantly known their names... Maybe I was a fan in another life? ;)

And my cat, Lemmy... When he was young, was really SMART. I know, everyone thinks their cat is a genius, but he was truly strange. People often commented that the way he looked at you was un-cat-like, more like the way a deranged person might look at you. I know some of it's not so strange, but here's some of the things he did:
After a fight with another cat in our house, he picked up a steak knife with his mouth and charged the other cat (we stopped Lemmy before he got to him).
We caught him painting on the wall several times. He would sneak over and dip his feet into our paint when we turned our backs, and would smear it on the wall. His best 'artwork' was a circle with lines radiating from it.
He often used our toilet, which we never taught him to do, and learned how to turn on and off various lights and appliances. We watched as he seemed to try to teach another cat, Gollum, to use a light switch. He set Gollum down in front of the switch, then demonstrated several times how to use it. Lemmy then sat back, and waited for Gollum to try it. He became angry when Gollum just sat there.
He was also very violent (yeah, he's a cat, I know). He had to kept away from our other male cats because he repeatedly raped them (and a couple times, tried to kill them).

Another odd thing he did: He would catch hornets, kill them, remove their stings, and hide their stinger-less corpses. We discovered his cache while he was munching on it like cereal.

Other things, too, but this is getting too long;) After he was neutered, he changed. We expected the rape and excessive violence to end, and it did, but his 'smart' behaviour seemed to decline as well. Over the years, he's become more 'normal.' Oh, I just made it sound like my cat's a psychopath. Oh, well.

---Lepus Rex