This vacation consideration is interesting. Do coworkers that go on vacation also drag you down? What about ill people? Are you saying you would like working only with single healthy people? Don't you feel like you would be losing smart guys that may want to go on holiday time to time or would like a family? Or your work is so simple that anyone can do repetitively for hours and hours and hours without stop - a work that does not require the smartest people, but the more-workhorse people perhaps?