Chess is a rich game that cannot be confined to a specific set of answers. So the best strategy is to use a mixture of attack and defensive moves as you saw in the examples above. The side which persists with one strategy will usually be punished, be it attacking relentlessly or defending passively. But if you were to lean towards one, go for the attacking strategy! It doesn’t mean you ignore defense, but you can give a slight preference to aggressive actions (like say 60-40). Read on to know why.