Controversial opinion.....
Sisko, while one of the more interesting and dynamic characters in the franchise, was a poor role model and kind of a war criminal.
He let his anger get the best of him and went on a rage fueled crusade againt Eddington that resulted in him committing an act of ethic cleansing agaist a Maquis colony.
Later, he directly played a part in the murder and cover-up of an innocent Romulan senator and his staff. While it can be argued that the and is justify the means, it was still murder, even if he didn't directly do the killing. He also continued to associate with Garak, a man he knows to be a stone cold killer, albeit a highly entertaining one.
The amusing part is that this all happened in the episode following the episode that introduced Section 31.
For all the talk about Section 31 being something the Federation should be morally above, Sisko sure seems like he'd make an excellent Section 31 agent.