I chose spending too much time on personal business, because I have a boss who does as little as possible, and does ALL her personal stuff on work time. whether it be the multitude of phone calls each and every day, or the coming and going as she pleases, due to appts, errands etc. I'm convinced she doens't want to give up any of "her" time for this stuff, so she does it on "work" time.
And our head honcho is never here, and as long as she gives him what he wants, there are no consequences.