A Very High Confidence or cocky smile.
:) - is a modest smile
:D - is a shit faced ear to ear grin, saying to the world, i know, i'm amazing
A Nod of Aproval meaning yes I agree, or Alight that sounds good
:):D:) is a nod, the :) is starting at rest, the :D goes up and than the :) goes back to rest, simply a nod of approval
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