In console terms, MS's track record doesn't really suck that bad. The original Xbox was as steady as a rock, and my roommate's still worked as good as new even after his nephew (2 or 3 at the time) quite literally used it as a toilet and took a piss on it. And there have even been reports of it being able to survive being shot by a gun. The machine was like a rock.
The problem with the 360 was that MS knew what features people wanted in a console (in terms of size, price, and features) and they worked towards that direction to beat Sony as cheaply as possible and it just didn't work. IF the 65nm machines still aren't making that mark, there will certainly be hell to pay. But we don't have much evidence for that just yet.
As for you, well, you're just lucky those other systems didn't freeze. Though, of course, long-term usage doesn't have as much to do with it as you'd think. Really, I've had a ton of systems lock up on me that never needed to be repaired at all. Lock-ups happen, sure, and they suck too, but they are hardly a matter for deep concern. Play-time has little do with it.
You do not have the right to never be offended.
