I have tried a few straps. I started with the with the good old pentax strap. Then went to the super padded/wide optech strap. Then started to use just a optech wrist lanyard, which is still in my arsenal. I then made the switch to a blackrapid strap. I really prefer this style of strap. It gets the camera down on your hip out of the way, and allows you to quickly access it when needed. This past year I made yet another switch to the luma labs cinch strap
Luma Labs — Cinch It is very similar to the black rapid, but has a couple key improvements. The cinch is a lot less bulky. I always found myself with a big sweat stain on my shoulder with the black rapid. It was also difficult sometimes to find a spot in my camera bag while attached. The cinch is just as comfortable without the bulk. The cinch also has one key feature.....It can cinch! The strap allows you to tighten it up against your body, getting it even further out of the way. It also secures it a lot more. So when your climbing to get that perfect shot you don't have to worry about your camera swinging around and banging into something. The one thing I do miss about the black rapid is the quick release clip. It did add to the bulk, but was nice from switching from camera to tripod collar depending on the lens. All this said I still use my optech wrist lanyard or nothing when I'm shooting a gig. I feel straps get in the way when your hands never leave camera. Straps are better for personal/travel shoots.