I saw something, somewhere, on another site...where a mathematician showed the compared probabilities associated with "m4Nuf4C+ur3D" passwords and those associated with passwords made of four 'random' words, for which a mnemonic could be contrived. The four random words were much more secure: e.g. Looking at my Avatar, one might pick "CrackerPonyFlipFlop". This kind of password is easier to remember AND more secure...and I guess I won't be using "CrackerPonyFlipFlop" anytime soon...