Remember I mentioned that I was going to read, "The Highly Sensitive Child?" I just bought it and find it awesomely helpful in understanding both myself and E. A lot of it we've been doing, but she offers a lot of great insights and suggestions. She speaks of "highly sensitive" as more of a technical temperament term.
I highly recommend this book so far. I even think her book, "The Highly Sensitive Person" would be really helpful for me as such.