Metric system quite intimately. I measure all my travels, all lengths of anything meaningful, just about everything with these units. I know how long it would take me to bike, walk or drive that.

I know how much that would cost me in server farm, apartment, and retail space. My exposure to a magnitude (or a collection of) meters far exceeds my exposure to a large area reserved for multiple say, soccer fields, or any intuition on really how large they are.

To be honest, whenever I hear something like "17 football fields" I go look up the distance of a football field to try to understand what the heck they are talking about. They might as well have phrased it as the distance a snail travels in the time it takes for a tea-candle to burn.

I use metric and imperial units every day. I intuitively and immediately know what 330 meters is in almost any context.