Agreed! My first password provided to me by OIT at Georgia Tech was just like that - long with lots of entropy and not pronounceable. And sure enough a few weeks of using it daily to logon to the campus wifi I knew it by heart. And every 90 days (or maybe it was 180.. been a while) when Georgia Tech would make us change our password, I picked something just as complex. And know thats how all my passwords are.
Unfortunately I now use 1Password to manage a lot of that and I no longer know all of my passwords by heart. :/