Need Your Input Please!

I've been pondering something and really want your ideas. Of the 9 disciples listed as the  Fruit of the Holy Spirit (love, joy, peace, patience, kindness, goodness, gentleness, faithfulness, self control), what attribute or "category" would you say THANKFULNESS, practicing an attitude of gratitude, best reflects? Why? Thanks. Just doing so thinking on my current book and looking for your thoughts. :)