Relaxing: Super Mario Sunshine. I loved the colorful graphics, and it was so much fun to hop around Delfino testing out your FLUDD attachments. One of my favorite Gamecube games.
Stressfull: Mortal Kombat 2 on PSN. I've never played the 2D MK games before, but I wasn't bad at the 3D versions, and I've heard great things about it, so I decided to buy it. I mean, who can resist buying a game for 5 bucks? Terrible mistake. I couldn't even beat Johnny fucking Cage, the very first opponent, on the easiest difficulty level. After 30 minutes of yelling at my ps3, I never touched the game again. What a waste of 5 bucks.