I am thankful for having another Thanksgiving with my wife (those that know, know) and my Mother.
I count each year with my Mom as special, she has beat some serious odds. In 1989 she was diagnosed with emphysema, was told if she didn't quit smoking she had 3 months tops. If she did quit smoking they thought maybe 18-24 months.
So, even if you hate family gatherings and some (most) of your relatives annoy you, remember there will come a day.