RE: Pinterest, Tumblr, etc. : "Web sites like these to escape, destress, perk up, calm down, feel something, not feel something, distract themselves and ... modulate pleasure and arousal." Well-written and spot-on in my experience. Also: "... collecting online is a form of self-expression for people who don’t create." Not everyone who curates can't create but it can be a substitute.
"I feel that nowadays we are in the age of curation, where more and more users are participating into this giant experiment, like never before, discovering that they can express themselves and whom their are through curating the internet for others."