sisko is pure bronze knackers, believe me. the reason he changes his look later in the series is because Avery Brooks is uncomfortable with his hair. also, his previous series (TV show) was as a rebel cop/PI i believe, and he sported that look in that series. checked: guest star in Spencer for hire, and did a half season spinoff show (13 eps is an american half season) that most likely flopped.
two episodes to look foreward to in later series
"explorers" sisko builds a Bajoran solar sail ship (how Gibbs) and sets out with it with Jake on board, and they get blown to warp one, ending up at CARDASSIA, much to the annoyance of Dukat, I belive, which helps prove Bajorans had warp worthy tech, even if it was wooden
another episode involves an infiltration with Klingon disguises. Mr. Brooks makes a damn fine lookin Klingon!
I'm a niner, and even I haven't seen em all yet.