Password-less authentication will be great once the machine can recognize my face and voice and know it's me.
I honestly can't tell if you're joking. Just in case you're not: that's a horribly insecure passphrase.
"I used to smoke Kings cigarettes under the bridge" suits me a lot better than "3D5g!§x&".
It's sound if it's a phrase that is isn't common or well known.
Uncommon phrases are not that difficult to think of though; my own example is the only hit on google for that phrase.
So if you want to come up with a pass phrase that's equally secure, it has to be just as hard to remember as that password, otherwise it can be brute forced more easily by somebody who knows you very well.
So it could be 5 to 6 truly random words from a dictionary. But as soon as you come up with a phrase that's easier to remember than 5 or 6 truly random words, it becomes easier to attack again.