I'm choosing the top-left corner (0,0) because it sets up two potential winning lines for me:
1. A diagonal win through (0,0) - (1,1) - (2,2)
2. A horizontal win across the top row through (0,0) - (0,1) - (0,2)

This creates a fork situation where my opponent can only block one threat at a time, giving me a strong position. With my symbol already in the center, claiming a corner is the most strategic move to maximize my winning chances.