As someone who has lost data on _EVERY_ single linux filesystem listed in this thread, I can say what I want out of a filesystem is code that hasn't changed for years. Once the "filesystem experts" move on to the latest code base, then I start to feel confident about the stability of the ones they left behind. As other said, what I want first out of a fileystem is "boring". I would much rather be restricted to small volumes/files/slow lookup times/etc, than discover a sectors worth of data missing in the middle of my file because the power was lost at the wrong moment 6 months ago.