The comment about "spines in the right seat" is entertaining. Too much spine and you could be black listed, viewed as a whiner, fail to upgrade, etc. The key is trying to find the right amount of spine, apparently.

I know people who have had their butt chewed for not flying they're schedule on a day when they just got back from spending an unscheduled overnight away from home due to mx or wx. Same clothes as day before and all. I try to use the underwear rule. If its the same as the day before, its a no-go.