That's just the old smell test. If you try to do a taste test on the flight plan it leaves goober all over it and is off-putting for the rest of the crew.
I have flown with a couple of real obsessive guys in my career. One would have circled his seat three times before sitting down had there been sufficient room. Getting him ready to push-back on schedule was the quite an effort. He didn't last, sad to say: he eventually got too paralysed with ritual to keep his job.