The person I'd like to describe is my colleague Dong-hyun, who I work with at an engineering company in Busan, in South Korea. We've shared an office for about three years.
He follows rules more carefully than anyone I've ever met. At work, he reads every safety notice and actually does what it says. When we visit construction sites, he's always the first to put on his helmet and boots, and he'll remind visitors to do the same, even senior managers. He fills in every form completely, and he keeps receipts for everything, so his expense claims are never questioned. Outside work it's the same. He never crosses the road on a red light, even at two in the morning when there isn't a car anywhere. He separates his recycling into the correct bags perfectly, which in Korea is quite complicated.
What do I think about it? Mostly I think it's admirable, and it's certainly useful in our job. In engineering, rules exist for good reasons, often because someone got hurt in the past. Last year he noticed that a supplier's documents were missing a safety certificate, and when we checked, the materials didn't meet the standard. His carefulness probably prevented a serious problem.
On the other hand, sometimes it's a bit much. When our team wanted to finish a project early by skipping an unnecessary internal meeting, he insisted we have it because it was in the process. I think rules should be followed, but also questioned when they no longer make sense. Dong-hyun is improving at that; recently he even suggested changing a form that he said was out of date, which I thought was progress.