Curious indeed how these things happen. The wand chooses the wizard, remember...I think we must expect great things from you, Mr. Potter... After all, He-Who-Must-Not-Be-Named did great things — terrible, yes, but great.
J. K. RowlingBut if it matters to you, you'll be able to choose Gryffindor over Slytherin. The Sorting Hat takes your choice into account." "Really?" "It did for me," said Harry. He had never told any of his children that before, and he saw the wonder in Albus's face when he said it.
J. K. Rowling