Tetris!! Man, how many thousands of hours did I spend playing that in my younger days? I got a hankering for Tetris about a year ago, and, given that all of the versions I've seen for the modern systems suck ass, I went on Ebay and bought an old NES for the express purpose of playing Tetris. Still haven't gotten as good as I used to be (I could get up around 700,000 on a good day), but still an awesome game. What I like to do sometimes is start on level 19 and see how far I can get.