I didn't create Sak with anything specific in mind. I was torn between Gallente and Civire at the start, but went for Civire due to the whole "militaristic" description in their bio. Also, you know, I didn't want her to be space French~. The male Civire looked like roid ragers, whereas the female Civire looked fairly nice while still possessing a militaristic stance to them. Hence, Sak's background as a female Civire.
Her personality was not "created" by me, it's the natural extension of 8 years in-game. I am not Sak, nor is she myself. When she first started doing RP, she was actually quite reserved and polite, with a lot of freespace ideology driving her as to "why" she fought people. Over time, the world's just naturally corrupted her point of view, making her far more crass and arrogant, but understandably considering she's killed hundreds of thousands of people in her life (that's not an RP handwave, those are actual player ships with their crews). So, she doesn't quite care what someone's background is or how they're perceived, unless they can back up their words in space. She also detests titles unless they're earned, especially ones like the FW ranks.
As for what I like about Sak, she's in many ways the kind of woman that I like in real life, in that she's intelligent, doesn't take bullshit, and is capable of protecting herself. Her ability to strategize and make an educated guess about the future is probably another trait I really admire, there are too many people that focus on the present and lack imagination for my liking IRL. There's also a softer side to her that's often overlooked that I think can be quite endearing as well, but most people won't get to see it, especially if they typecast her as some nullsec pirate bitch, or something along those lines.
There's also her four sisters... I feel a bit bad, in that I don't have enough time in real life to devote to them to flesh out their stories, their experiences. In many ways, they're unfortunately riding the coattails of their eldest sister, bouncing from one thing in life to another, trying to find purpose but inevitably being compared to someone else. In that respect, I think they resemble a lot of sibling relationships, especially where one member of the family is very successful, and the rest are working retail or fast-food or the like, just trying to get by in life.
With them, though, they're still discovering what they want to do with their life. Ereka's probably the most far down the road, I think, mostly due to her hatred for Heth and what he represents about the Caldari people, making them all look like a bunch of racist, genocidal idiots. She's always had a bit of a crush, for lack of better word, on the Fed, and has flirted with the Fed militia in the past. However, I think what it comes down to is the four need more interaction with others to really develop their personalities, their motivations, etc., and that can only come about with time and things like friendships.
PS: I'm really, really exhausted atm, sleep time.