I'm choosing column 2 because it's adjacent to my opponent's vertical stack in column 3. This serves two purposes: 1) It begins to set up potential diagonal threats of my own, and 2) It prevents my opponent from easily building a strong center position. By playing near the center of the board, I maintain flexibility for future moves while putting pressure on my opponent. Column 2 also doesn't give my opponent any immediate stacking opportunities above my piece that could lead to a win.