The game that eats my time
Since I bought my Wii there has been one game that has eaten into my free time day after day, it's caused me and my housemate to play for 7 hours straight (finishing at 3:30am) even though I had to be up for work at 7am and got my mum playing against me on Christmas day. Bomberman '93 is this game, it's addictive, easy to pick up and well worth the 800 points I spent on it.
I can't recommend this game enough, if you weren't about for bomberman the first time get this buy it, get four of your friends over for the evening (yes, you can have 5 player games) and have some fun.
(I'm half supprised this game hasn't been banned yet as we keep getting told kids play video games and want to act them out in real life. I mean, bombing people, surely this game is a risk to national security, maybe it's used in terrorist training camps, I dunno.)