lol, i'm not memorizing anything, i just look at my keyboard, and type "qwertyasdfgh...." etc or something like that, following the keys in an specific (easy to remember) order, like the first 6 keys of the first row (qwerty), then the first 6 keys of the second row (asdfgh) , and so on, i hope you get the idea.
And since the PS3 has a qwerty "keyboard" when putting passwords , i don't have much problem there.
Then the numbers is something simple like pick an N number and type such number N times, like "9 times 9" (999999999) or "12 times 12" (12121212.....)
And you know what, i think you made me realize this is too much hassle XD.
@Musolini
My DC pass is 17 characters, but this time i got it memorized, like other of my passwords, it's the name of some Movie/Game/Place/Song/Music Band/etc.