Especially if you are logging into multiple systems regularly using domain credentials, it rapidly becomes apparent that the faster and easier the password is to type, the better. I've found that some passwords with symbols and numbers just roll off the fingertips with a little practice, others not so much, but longer passphrases are for some reason the worst.
This. My password is not a word, not even a word with substitutions, but it is optimized towards typing it on a keyboard (in terms of when caps come in, when numbers are added, switching hands, etc). I can knock it out in a second and it's muscle memory with zero risk of forgetting. correct horse battery staple, not so much. I lose some entropy by making it typing-friendly, but the cracking algorithm to simulate that would be pretty difficult. I'll take the loss.
As an aside, 1000 guesses a second? Seems generous.
