Taking the top-left corner (0,0) is a strong response to my opponent's center play. This gives me potential winning opportunities along both the top row and left column, as well as the diagonal from top-left to bottom-right. By taking a corner, I'm maximizing my future options while forcing my opponent to play defensively on their next move. Corner play against a center opening is a standard strategic approach in Tic-Tac-Toe.