My favorite strap for a long time has been the Tamrac N-45. This is the one with a suede-like neck pad and ballistic nylon and plastic quick-release clips. I find it's very comfortable worn to the side, either over my left shoulder or around my neck and right shoulder so that the camera hangs low on my left hip where it's out of my way but I can reach it...
I use the same strap, but I have zip-tied the "quick release" buckles together as I don't trust 'em with my (heavy) Nikon F3HP with MD4 motordrive and zoom lens.
Aberdeen, WA USA
------------------------------------- My film cameras are all Nikons: F3HP, F4s, N90s, N8008, N8008s.
Can't say I have much of an opinion on lens straps, can't say I care for the really thin ones, I tend to use straps about an inch wide, depends on the size of the camera, on my Bronica I have an elasticated one!
My F100 and D200 both have Nikon AH-4 hand straps, which slip on like a glove. Highly adjustable, fast to use, very secure, and much less noticeable in a crowd. You can relax your hand and let your wrist take the weight while carrying, avoiding tiring and finger cramps. Allows quick reaction and complete freedom of movement while framing and shooting. They are the only really high quality hand straps I've found, and I wasted money on several cheaper versions before I finally paid $65 each for a pair of these from a Hong Kong dealer. Expensive and hard to find, and worth every penny.
For rangefinders and lighter cameras I use various permanently-installed (not snap-together) neck straps, which are fine when around your neck, but don't ever carry a camera around in your hand with the neck strap dangling from it. The strap is positively guaranteed to catch on something as you pass by, snatching it instantly from your relaxed grip. My wallet and I learned that lesson the hard way a long time ago.