ROCK BUSTAAAH!

Thank you for your question.

I'm glad you liked my interpretation of the characters. I think all the Wily robots has a strong urge to fight and derives a sense of reward from destroying Rockman. It's not about wanting Rockman to be destroy, but purely for the reward feeling from carried out the orders they were given.

They also can feeling rewarded by receiving praise, but perhaps Dr. Wily doesn't praise them often.

Not like some of the Wily robots, who can also get the reward feeling from other things like bonding with stage enemy or their hobby. The main source of feeling rewarded for Quick is "defeat/destroy Rockman" or "receiving praise".

That's why Quick would try anything to make Rockman keep coming back to fight him.

However when Rock is not being "Rockman", there's no point for Quick to attack him. And if Rock see Quick not attack, he'd praise him for it. Which make Quick feeling rewarded too. This might make him hesitate. And the thought of if "Rock" get destroy, he won't see "Rockman" again would also bother him.