I personally cared for the characters myself.
True they were sometimes bit too edgy,
but honestly they felt often more real, than people in many other Tv-shows.
I also really liked the Adama-Roslin relationship. It showed nicely the more caring and tender side of Adama( yes, he had that side).
NuBSG was not a perfect show, but it is a damn good one.
Lots of good drama, interesting characters, plot twists you don't see coming..and some cool action,too.
Plus the cast was very talented and so was the writing