In a sci-fi show with countless possibilities for how characters appear and act, what they believe, how their culture and history have molded them into something unique, to give them unique viewpoints in order to look upon, evaluate and address the human condition, all we ever get are more humans, born and raised on Earth, often with a dead parent, all with a generic "human" culture (sometimes with a few clearly token POC thrown in), predominantly speaking in American/human accents. For me all that is just dull.
In DS9, Kira was a Bajoran, she was in the Militia, a former terrorist now having to wear a veil of civility to deal with the Federation, the principles and protocols of which she didn't agree with. Quark was a profit-driven Ferengi, out looking to serve his own self interests. Odo was the fish out of water, a true outsider and loner, who had to turn his back on his peoples thirst for domination and stand what he believed was right. Dax had centuries of life and experience behind her, she was always on the look out for a new adventure and embraced all that life had to give knowing that there were no guarantees. Garak was 5000 shades of gray, you never knew just where he was coming from, what his agenda was or whose side he was on. Kai Winn was an egotistical, self-serving and power-hungry woman easily one of the franchises most complex antagonists. Just a sample of the wonderful assortment of non-human characters that just brought so much depth, so many new possibilities, so many unique and different ways of looking at things, showing that a series can survive when humans are in the minority.
