Addictive Games

I get into ruts where I play the same game over and over. I eventually get sick of it, and go back to sanity, often never to return to the troubling activity. Currently, I'm in the throes of sudoku, which seems to have popped up everywhere overnight. I've found a site with an essentially unlimited number of puzzles, and have been racing to see how fast I can solve them. Even though I've only been playing it for a couple of weeks, it's become a major timesink, and I'm looking forward to burning out -- I've been neglecting jumbalaya (Boggle), and I'm overdue to put in some time with my friends there.