Risa

I mean, DS9 is one of the most beloved trek shows, and for good reason. But it does stray from what Trek was about before that, enlightened people seeking out the unknown in the spirit of exploration and friendship, facing philosophical questions and abstract real life issues along the way; but always with a sense of optimism and positivity.

Meanwhile DS9 is very much centered around a specific place and the surroundings like bajor and cardassia; dropping the episodic nature for a continuous storyline that, in addition to introducing magical beings and spiritualism to the setting, is very heavy on conflict and the darker side of the federation like all episodes related to section 31.