I have a Playstation 2, Nintendo DS lite, and a Gamecube.
Nowadays, I rarely play any of my Gamecube games. Pokemon Colosseum is an exception, however. I can just go to a friend's house to play as many Mario Cart games as I want. Besides, most of the Gamecube games that I have are broken or missing.
The only thing that I play on my Nintendo DS lite are Pokemon games. I really don't have any spare money to get any other games. It's a shame, really, because I've always wanted to play The Legend of Zelda: Spirit Tracks.
I am in love with my Playstation 2. Well, not as much as the Xbox 360 or the Playstation 3, but... it's still my most-played gaming console. Whenever I have nothing to do at home, I would just play Rockband, Call of Duty: World at War, Dynasty Warriors 5: Xtreme Legends, etc. Even though it gets repetitive after a while, I still love playing them.