Jim: I know I speak for most of the other folks here when I say that I hope the "other camper" isn't Bigfoot.

Kidding aside, I also tend to sleep in clothes, for much the same reasons you give. In particular, I also tend to use a lighter sleeping bag and sleep in a down jacket when it's chilly (and down pants and booties when it's downright cold); one of the attractions, as you point out, is that you are wearing some insulation when you leave that nice warm bag.

In summer, in the East, I tend not to sleep "in" a bag at all - it's too hot, even for my "summer" bag. I tend to leave it pushed into the foot of the tent until the middle of the night, when it cools down enough that I pull it loosely over me like a blanket. (I use a WM Mitylite for a summer bag, but the MSR Ventra also works well.)