A brother in arms and ohms

I bumped into my friend Fred on the dock — he runs a boutique boat repair service. He's the guy the U.S. Coast Guard calls when they need something done fast and right.

He’s the guy I call when the task is above my pay grade, like the installation of a state-of-the art lithium charging systems including 800AH of batteries, 3000W inverter charger, battery monitor system (BMS), 1-click cutovers for jumping one bank of batteries to the other if one fails, warning systems when the batteries are running low, integration with my engine's alternator, genset and 1000W of solar panels, automatic fault-detection and shutdown of charging systems to prevent over-charging – and all off it broadcasting to my phone via Bluetooth, so I can see the health of the system in the palm of my hand.

Fred used to work as a data analyst in the Navy, lots of database and systems work. I’m pretty sure he’s an ISTJ. Fred doesn’t chase rainbows the way I do. He doesn't fail the way I do. That's why the Coast Guard calls him instead of me.

We were standing on the dock. I told him: “Solving these problems with AI is all about persistence and optimization.”

“When I started with computers, I started with 8mb of RAM,” I said.

Fred looked at me and said: “That’s nothing—I started with 64K.” That blew me away.

I asked him, “Did you use an Altair 8800?” – the very first personal computer.

He said, “Yep. Just switches. No keyboard at all.”

The only other person I ever heard of who used an Altair 8800 was Bill Gates.

That moment crystallized for me a key point: Fred and I share a trait — relentless persistence and the pursuit of perfection. But the motivation behind those traits is different:

For Fred, as an ISTJ, it’s about structure, rules, mastery of the known system. He lives in that world. He doesn’t chase rainbows; he nails the framework, he gets the job done. For me an INTJ, the same persistence is fueled by mission and vision — I’m driven to rebuild the system, to leap into what might be.

So yes: the INTJ might make the conceptual leap and monetize an idea; but ISTJs always keep the machine running perfectly. Neither is better — both are powerful in their way.

And the shared trait? That’s what matters: what drives us is different, but the outcome—persistence, optimization, perfection—is the same.