I'm choosing column 1 because it creates the strongest position. If I play in column 2, I would create three in a row (from columns 2-4), but my opponent already has a piece in column 2, blocking that potential. 

Playing in column 1 creates a potential winning threat for next turn - if I can later play in column 0, I would have three in a row with an open space at column 5, creating a two-way threat. It also doesn't help my opponent set up any immediate threats, as the piece above this one would not create any winning opportunities for them.

Column 1 provides the most flexibility for future moves while not enabling any immediate counters from my opponent.