GraphineOS for my main device. I also have a gaming handheld, Retroid Pocket 3+ running lineageOS

CalyxOS on my Pixel 6a

LineageOS without any Google stuff installed.

GApps-less LineageOS, currently without root. Will probably go back to a rooted setup, though, mostly because the default font is depressing me.

LineageOS 19.1 with microG.

CalyxOS

GrapheneOS…though it’s a a fully featured and production ready Operating System (OS), not a “ROM.”

“GrapheneOS is a privacy and security focused mobile OS with Android app compatibility developed as a non-profit open source project. It’s focused on the research and development of privacy and security technology including substantial improvements to sandboxing, exploit mitigations and the permission model.” https://grapheneos.org/

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Superior OS.

crDroid