In other words, an adaptive style is less about "I'm playing according to my preferred style," and more about letting the game itself decide how you play.
Yes. That's the correct style of play.
Every position has a correct approach. One can't attack if the requirements for a successful attack are not present, neither should defend while having a winning position.
The key to playing chess well is not in choosing between attack or defense for its own merits, because an attack or a defense is not abstract, not universal. The key is in being able to read the position and play the correct plan according to it.
A chess game is more or less an attempt to move your pieces and pawns according to chess logic, not according to your desire to win or draw, and who fails to do so more than the opponent loses the game. If your opponent plays a move you haven't considered to be available to him, then either you or he has strayed from correct play. Hence if you attack, you are allowed to do so by the opponent, and vice versa. Or, more exactly said, you are both forced to do that according to the position, which is the common thing between both sides, and the thing that along with game rules is objective and that is your only and inevitable condition. Play that is not based on the position's features, be it attacking, defending or other, cannot succeed unless allowed by the opponent.
However, people have unique approach to playing chess, as they have different decision making algorithms - not only for the game, but in general too. Hence mistakes are inevitable, as long as the chess position is objective and the players are subjective.
And mistakes occur where your personal view of the game doesn't match the character of the position but you are forcing it upon your moves.
Having a "playing style" is therefore good for one thing - it will give you a set of candidate moves that are different from the candidate moves your opponent will consider to be available to you. One of you will overlook something somewhere. And there's where the other one will be able to take an advantage - whether successfully or not depends on the opponent's ability to find why that move is incorrect and exploit that.
Here's why having a "defensive" or "attacking" style rather than a combined one will hinder your play, by allowing your opponent to surprize you - in other words by making you blunder. If you feel you like to attack, learn to defend. If you like to defend, learn to attack. Because both are connected, and the only difference is half a move.
It seems to me that some moments in chess call for a flamboyant attacking style, whereas others call for patient, methodical defense. Consequently, the style I prefer is neither inherently attacking nor inherently defensive, but is adaptive in character. In an adaptive style, the emphasis is on discerning what kind of response any particular moment in a game is calling for, and then remaining faithful to whatever that happens to be. In other words, an adaptive style is less about "I'm playing according to my preferred style," and more about letting the game itself decide how you play.