I've been using several different ones over the years (changing them as needed) for several different levels of security. That said, I've typically kept them less than 10 characters or so even though they're random and not likely to be "guessed". Dang processors have gotten fast enough so it only takes less than 60 seconds to "crack" most passwords of this length I now learn
. So, I reckon it's time for this ol' dawg to learn a new trick....LONG passwords (i.e a long sentence) seems be the way of the future out of necessity....YMMV.