Off late I have been traversing this thread and I find quite a good number of books which puys enjoy reading and suggest others.
I am in the process of reading The Art Of Choosing by Sheena Iyengar.
I don't remember if I have recommended this book here or not. I read this about an year back and I was deeply affected by it.

Here are few lines from the wiki profile of the author
Sheena Iyengar was born in Toronto, Canada in 1969. Her parents had emigrated there from Delhi, India.
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When Iyengar was three years old, she was diagnosed with a rare form of retinitis pigmentosa, an inherited disease of retinal degeneration. By 6th grade, Iyengar had lost the ability to read, and by 11th grade, she had lost her sight entirely and could only perceive light. Iyengars life had also taken another turn in high school; when she was 13, her father died of a heart attack.
I found the above fact very intriguing and it played a part in making me finally picking up the book.
The thing that I remember most from the book is a passage where she has written about a person's personality traits and behavior. While reading this passage I got the feel as if it has been written exclusively for me and as if she is talking about my very own personality. A little spooky, huh?
This will be an extremely eventful ride for everyone especially those who have not already read any of the behavioral gurus like Gladwell, Ariely or Tim Harford.