Alright, I'll start with this!
Hehe, I got my little brother to help me a little bit with this one.
Anyways, I got a launch 20GB model and it died on me in Mid 2007. I got the replacement model from my RROD and this one died on me Novemeber of 2008 due to a crappy video card. That wasn't in warranty.
So, I traded it in at Gamestop on Black Friday and bought a used one. It's been working fine ever since.
So, two 360s have died and I'm on my 3rd.