Although many people now think of surveillance or the "worried well" when they hear the term "quantified self", QS isn't about optimization, but about self discovery and learning.
Gary Wolf et al. have a new book coming out that I hope will move us beyond the doom/hype: www.quantifiedself.com/book/
quantifiedself.com
The Quantified Self: Learning to Observe
A groundbreaking guide to scientific reasoning at the scale of a single life. By Gary Wolf. Coming October 6.