For passwords I need to remember (rather than just putting in my password manager), I've taken to using lines from foreign content, especially if it's something I've translated myself or I've introduced some deliberate misreadings in. I imagine very few dictionaries would have "personawakokoronoka!" in them (not a password I've used, but illustrates the idea). Derived from:

ペルソナは心の力 - read as "perusona wa kokoro no chikara"

Then I've replaced it with the English spelling of Persona -> "persona wa kokoro no chikara"

Then I replace chikara with a misreading - when I first learnt the characters, I mixed up 力 (chikara) with the katakana カ (ka) and often read both as ka -> "persona wa koroko no ka"

Then remove the (unneeded) spaces and add a "!" for good measure -> "personawakokoronoka!"

Dead easy for me to remember, but (I believe) difficult to derive/guess or dictionary attack (especially if I start with a longer sentence).

"Blamm0!One ring to rule them all" would be better, in that it adds a personal salt. If your personal salt satisfies length and character class requirements by itself, so much the better.

Or maybe "One And ring in to the rule darkness them bind all, them." in that it applies a personal transformation rule.

Or do both.

It's not as secure as other methods of password generation, but makes yours more resistant to (unabridged) dictionary attacks. If an attacker learns your personal salt, they could create a special dictionary attack just for your passwords, but this is another case of not outrunning the tiger when you can outrun your friend. Far easier to run the vanilla dictionary attack against everyone else who doesn't salt/transform.