Are You Thankful for Suffering?

This time of year we often recount what we are thankful for. It is a time of counting our blessings and praising God for what He has done. It is a time of focusing on the good and hoping the bad is far to come. Yet often those who are the loudest at giving thanks now are also the loudest at grumbling about the bad. Is that how it should be? Does that reflect a truly grateful heart?