I don’t remember where I started, but for a long time it was Firefly characters. I had to dig deep enough to name a system YoSaffBridge.
Then I switched to gemstones from Steven Universe. Which I still use for mostly for “end user devices”, i.e. desktops, mobile, cars (mine is peridot).
The functional stuff and the VMs I name by function. Router is router, switches are sw-0#, pihole-0#, minecraft, plex, ipam (yes I have an ipam for my network), etc…
It’s simpler and I like to be able just ssh/browse to “function” than trying to remember that ipam is on bismuth.
Years of working for a company that did lots of acquisitions, where I had to deal with integrating whimsically named infrastructure, gave me a strong appreciation for a functional and consistent naming scheme.