Wikipedia is my new favorite way to waste my semi-precious time. I love the thread of learning that occurs. For example, I decided to look up Tom Selleck because I had read something about his conservative politics, which led me to Magnum, PI, which led me to "Jump the Shark"...a reference to when The Fonz jumped a shark while on water skis in a Happy Days episode. The show was nearing the end and was doing its best to keep viewers. I learn the funniest things just by typing in one reference and seeing where it leads me.
Wikipedia makes me feel less stupid. If there is a reference or a historical event that is mentioned in the news or in a show, I just type it into Wikipedia and my mind is at ease. Sure, it is not 100% reliable, but I am not writing a term paper. I am just being curious.
I spent at least 40 minutes last night reading about The Sopranos. Wikipedia is there for when I need more of something good. I watched the bittersweet last episode of The Sopranos and was left with wanting more. Wikipedia was there for me.