Neck strap, hand grip strap or just hold the camera in your hands?
Sling strap here (Black Rapid but brand matters not) for whenever I am out and about. Just hand hold other times.
Pat in NH
I have the op/tech neck strap and the wrist strap. I like the op/tech system with the uni-loops. I can switch between neck and wrist strap quickly or nothing, leaving just the short connectors on the camera. I prefer the neck strap over a sling when I'm in the canoe or rowboat so the camera stays in my lap area rather than bumping my arm or the seat.
I just this week bought the op/tech sling to try. I haven't been out walking with it, but I think I will like it. Some people might not like the strap falling over the back on the hand as you shoot, but it seems fine to me. There is a video on their web site showing how its used.