I think different things work for different people. We're all completely different and react to the world in different ways, and there's no right or wrong way. I think, with anything, there is a generalized accepted social norm, but that's only there because that is the type of experience that relates to *most* people. Outside of the few topics in life that I'm passionate about (pinball, music, movies, sports cars, etc.), even though I slightly lean on the extroverted side of a Myers Briggs scale, I could do without 80% of general social interaction as, not to sound callous, but I generally don't care about boring small talk, people's work lives, their kids, etc. outside of those of the couple close friends I have. I don't think there is anything wrong with retracting into something you enjoy, the world at large is stressful and anxiety inducing, having your own little world away from it all to enjoy is not a bad thing at all, even if no one else is a part of it.