"Mm, I am a genius," Jack agreed with a grin in his voice. "I don't know why the Hat didn't put me in Ravenclaw, in fact." Because Gryffindor was right where he belonged! He was brave and impulsive and confident and all of that.
And also, it had been where Andrew was, so that made it all the more right. When Andrew (who came before him in the alphabet) had been sorted into Gryffindor, young Jack had hoped and hoped that he would be as well. And he was!
"Alright. I'll send an owl then. What do you want? I want blueberry pancakes. And sausage. Lots and lots of sausage. Ooh and bacon as well."