My black / onyx DS Lite broke by accident when playing Diddy Kong Racing DS when around it came out, I think. Then I got a DSi.. the R button stopped working at some point and instead of repairing it, I decided to get the DSi XL instead, which to this day, has never recieved problems (and it's pretty much the best handheld I've ever used, even though it's just a uvariation of the same thing). My original 3DS hasn't recieved probems so far but I'll be upgrading to the New 3DS XL, just not at launch. I kinda break stuff too for some reason, I don't know why.
The only thing I'd actually break would be the GamePad as it gets too much dust and I'm getting bored of cleaning it daily.
Jokes, jokes.