I'm glad Sivers focused on the positive, but our preferences don't only change to like more things. It would have been interesting to hear what Sivers used to love that he now hates.<p>In fact, I think we end up enjoying fewer things as we get older. After all, 90% of everything is crap[1], and decades of experience make us better at discerning quality. Also, the more memories we have, the less likely any new one will compare favorably to our best ones.<p>1. <a href="http://en.wikipedia.org/wiki/Sturgeon's_law" rel="nofollow">http://en.wikipedia.org/wiki/Sturgeon's_law</a>