I have recently bought a DS with an M3 Sakura card, and when I'm playing Mario Kart DS, the screen goes black after one or two races and I have to restart. I've only really played Mario Kart on it so far, so I can't say for sure whether this happens on other games. It also can hang on the health...
I feel like school, back when I was actually in school, was more entertaining though, because of how much I get to interact with people, hang out with friends, and other stuff like that. All I get to talk to at work is my boring coworkers lol