Of all the questions that we have posed with our Scan Day Themes, this was the easiest to answer.
I wear a variety of Heuer chronographs during the day / at the office, but this Viceroy Autavia (Reference 11630) is the one that I switch to almost every night, when I get home. I am less concerned about it getting nicked or jarred, and it is comfortable to wear. It also gets a lot of weekend duty -- for working around the house, activities with the kids, etc.
Prior to my acquiring the Viceroy, the Autavia shown below (Reference 113.603; Israeli military issue) was my "go to" chronograph, having the duty for most nights and weekends. The excellent luminous also makes it a good one for the pre-dawn wake-ups.
So these are the two that I have "gone to" most frequently over the last year or so.
Jeff