After 40 years, I thought that I would never bother with crochet except to do edging on my knitting, BUT it was granny squares that changed my mind.  My first crochet item was a granny square blanket, but I did bigger squares than what you are doing.  It was the quickest blanket I ever did and I got tons of compliments.  Your blanket is beautiful.  I LOVE the color combo.  I am on to Tunsian Crochet now.  It is sort of a Crochet/Knit hybrid!