Yep, for a medium-length blae (6-12") I like SOB carry. It doesn't snag (But I'm broad of back, if you're skinny, I can see where it'd be a problem), and can put it back without craning my neck to see (I think this depends on what sheath you use). I use a traditional rucksack (meaning it's short and squat, rather than a long, thin tube like most modern packs), so it doesn't interfere with my pack. I've also fallen over and it's not a problem. But I wear my pants at my waist. If you wear your lower, where you belt kind of rests on top of the cocyx area, rather than up on the points of the hip, it will hurt if you land on it.
File this under "to each his own." It works for some, not for others. For a short knife, I like horizontal carry at the 10 o'clock position. I find I can reach it easily with either hand and it's much more comfortable to crouch or sit than with a vertical sheath.