Perpetual aiming at wit is a very bad part of conversation. It is done to support a character: it generally fails; it is a sort of insult on the company, and a restraint upon the speaker.
When I'm writing a score, I'm constantly looking for ways to improve on it, even when I think it's working well. I don't give up on things, and am always trying to make incremental improvements, which means I never finish writing a score early!