What can you say about season 6 of how i met your mother?

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For me season 6 is the season with the most depth. All of the characters have so many interesting stories, just like Marshall's father dying, and Barney finding his own dad. It is becoming a light drama. I just hope that someday I would really know who is the wife of Ted. Isn't this the best series ever? What is your views on this season?