I guess since I have (counts quickly in head) 7-10 camera bags, I might qualify for OBC... except they are almost all Kata GDC (which means somewhat armored) models from a few years back, with quite a few being bought for pennies on the dollar at closeouts. Vitec/Manfrotto bought Kata and slowly killed off the brand. Their old designs are slowly trickling out as kinda crappy Manfrotto bags now... too sad!
My favorite is the (long discontinued)
Kata R-104 backpack:
That big, ribbed flap can be pull-zipped open and release the primary camera (with 50-500 attached) while all the other lenses and flashes, etc., stay inside. I've put huge miles on this bag, and it only looks dusty. The yellow interior is still my favorite for finding lost camera attachments in dim light, and that has also held up well over 10 years. This is why I bought an R-102, SB-904, W-94, HB-205, tripod bags, lens bags, etc., etc.
Biggest disappointment would be the (very recently introduced)
Domke Ledger:
I had the original Domke F2 for a long time before it "went missing" in Central America, and recently had a chance to try out the Next Generation of Domke bags, which include the Ledger. It is a big shoulder bag in the style of the F2, but has rigid sides and adjustable dividers. Alas, it only comes with 2 dividers (1 long, 1 short) so most of the interior space is either wasted or you have gear on top of gear with no separation. Next, it's heavy as hell even when completely empty, and a pain to get open unless you only use the velcro (no zippers to be found on it). Finally, it costs $300, while a new F2 is $110. WTF??