Gamer. Depending on where you say it, the word can be anything from an honourable title to a cuss word. My grandma spends more time each week playing Words With Friends than I spend using words or having actual friends. Despite that fact, she would never identify herself as a Gamer, and she's far from the only person who feels that way.
Weirdly, Tetris has given me a way that I can practice going easy on myself. I don't have to maintain a spot on someone else's leader board, or have each game trump my last. I can be more... zen. I can relax. And, much to my surprise, this zen feeling has translated into other areas of my life. And, much to my surprise, this zen feeling has translated into other areas of my life.