I have accreted so many bags that I like for this particular use that saying "this is The One" is just about impossible. 🙂
Just a few that work extremely well:
PD Everyday Sling 5L (v1) ... excellent!
Billingham Alice L2 ... excellent, more room!
Wotancraft MiniRider sling ... superb!
Patagonia Atom 8L ... fantastic!
Domke F5XB ... Outstanding!
LOL!
What do I actually use? Well, my Leica CL (digital) lives in the PD Sling 5L all the time. My Hasselblad 907x with two lenses lives in the Billingham L2 most of the time. The Domke F5XB I've owned since 1989 has carried nearly every camera I've owned over this time and gone around the world with me more than twice. The Wotancraft MiniRider compresses for a light load like the CL and expands up to big enough to carry a Hasselblad 500CM+80mm lens and has the very best harness to keep it still and safe on motorcycle or bicycle...
What I use nearly every day right now is the Patagonia Atom 8L. It's not technically a camera bag, just a small, light sling-type day bag, but I've found it incredibly flexible and comfortable for bicycling and walking. It only has padding on the side against my back, which maximizes its capacity/size envelope but doesn't offer much protection against casual tossing it down without thinking. It's the fastest bag of all the above for me to stop, while on the bicycle, flip around to my chest, nip out the camera, take a shot, and toss the camera back in, move on. The design of the strap keeps it in place nicely, it can carry my iPad Pro 11" easily (in an internal, lined pocket!), it's utterly simple and very light weight. And it cost me only about $50.
I once gave away and sold three dozen bags that had accreted, keeping only the three that worked. But the closet is full of various bags. Again. :angel:
G