Hi HE'S GONE,
Over the years I have utilized almost all the lens bag & pouch offerings (from Lowepro's S&F Series and in the last approximately 5yrs or so the Think Tank's MODULAR & SKIN Series).
While everyone has to find solutions that work tailored to their diverse & specific needs, with time I've found: "less is more"... and now my primary solution for casual use, shoots, or events/weddings etc. (particularly for occasional air-travel/destination shooting), is just this:
Think Tank SKIN BODY Bag [Mfr# 052]:
Use either on a non-photography belt, or a Think Tank SKIN belt, or with a thin Think Tank shoulder strap.
It nicely & comfortably holds two lenses, or a lens & a 600EX-RT, with a good front pocket for cell phone, ND & CPL filters, business cards, misc, etc.
(the bottom of this bag/pouch has a nifty/convenient zipper, thus expanding/elongating the bag/pouch length if one of the carrying lenses is say a 70-200Lf.8 IS mkII or something over 8.2". ID capacity is: 246-354 cubic inches).
If one camera then the Think Tank SKIN BODY Bag, in conjunction a with Peak Design CapturePro Version 2:
if two cameras, then Think Tank SKIN BODY Bag in conjunction with a Cotton Carrier VEST (with a Cotton Carrier HOLSTER).
(comfort & function are my criteria and am not bothered by appearance. If a venue implies an atmosphere of subtleness or a dress, then I will have a light/thin fashionable dress-jacket or something over my upper-half of my body, thus concealing the obviousness of the Cotton Carrier.
-1DmkIII or 5DmkIII with mounted 70-200Lf2.8ISmkII on vest (with mounted 600EX-RT if no assistant)
-5DmkIII(2nd) with mounted 24-70Lf2.8mkII on holster (with mounted 600EX-RT if no assistant)
-85Lf1.2 in TT SKIN BODY bag
-spare 600EX-RT in TT SKIN BODY bag (for rim, backlight accent lighting effects, etc.)
The TT SKIN BODY Bag enables a lot of flexibility, with surprising great lens carrying capacity without bulk, that often lens pouches create (particularly the Lowepro pouches which offer fine quality protection at the expense of bulkiness).
For example: with the TT SKIN BODY bag, last weekend at an evening venue was shooting mingling people cocktail-style party, then was shooting them as a 90-person group photo (nicely & evenly lit with just 600EX-RT's).
You then spend more time shooting and no-time fiddling; the Think Tank SKIN BODY bag capably enables you to "get IN" and "get OUT" - to capture or create the image!
Just one view...