The fantastic webcomic xkcd recently made a great point about password choice.

If you create a passphrase based on just four common, randomly chosen words, it is both easier for you to remember and harder for an attacker to crack.

xkcd: Password Strength

"Password Strength",

We have about 3000 words in our list; and they have been especially chosen so as to be easy to visualize. In this way, you can use the mnemonic method as per the comic strip above to make it stick in your memory.

So that's this site's single intent: to make that process as easy as possible, and then get out of your way.