When I worked in a school where I knew I was leaving at the end of the year, my co-workers were very surprised that I didn't "take all my sick days," but surprised in a positive way. It was a somewhat dangerous school and teachers were either their putting in time or were there with a missionary spirit. Since I was leaving, the positive ones were impressed that I valued what we were doing enough to keep doing it.
I did take some personal days - like that court appearance 'cause if you forgot to put your county sticker on your car and they pulled you over, if you showed up in court with proof that you'd paid it you didn't have to pay the fine. Of course, I didn't tell my students that's why I had to go to court - being on the other side of the law was a good thing in their eyes...