I'm not sure if there's any POV I wouldn't/can't write, except maybe any sports figure (as I find the watching of sports rather boring). I just partition off a part of my brain for the given POV, allowing me to write as he'd think and do without becoming preoccupied with a distasteful personality.
Someone mentioned about birthing scenes, and I did do one, but with a slight twist. The mother giving birth was a demon queen so the thrashing about got rather amusing in an almost dark humor sort of way.