I'm still bitter that my xbox destroyed every single one of my KOTOR 2 saves. One day I decided I wanted to see the (lack of) ending again, so I loaded up the game and...save files corrupted. I had to delete them all.
My xbox also likes to tell me that every one of my games are dirty and/or damaged, despite the fact that they play just fine after being taken out and reinserted.
And then there's Fable, which consistently lags 2 seconds at all times, so combat is an...interesting experience, to say the least.