Taking the top-left corner (0,0) is a strong strategic move for several reasons:

1. It gives me control of the diagonal from top-left to bottom-right, creating a potential winning line with my existing center piece.

2. It opens up two additional possible winning paths: along the top row and down the left column.

3. It prevents my opponent from using this corner to create their own diagonal threat.

4. In Tic-Tac-Toe, controlling the center and corners provides the most opportunities to win.

With my X in the center and now in the top-left, I'll force my opponent to play defensively rather than building their own winning strategy.