Choosing A Backpack

What criteria would you use ?
Is your sole consideration, after comfort, bodies / lenses it can hold or do you place importance on " accessories and other items "
For me these would be.
1) It needs to be able to have a tripod attached for carrying...my tripod is 67cm closed without an head.
2) Carry a water bottle / snacks
3) Space for waterproof jacket and fleece & travel towel
4) Space for filters & adaptors / holders / viewing loupe
As for packing, do you reconfigure it every time you go out, assuming you do not take everything ( that would be too heavy for me ) with perhaps having several, what f stop calls icu and Shimoda core unit just swapping them out / in ?
There are so many options available these days it is, for me, getting increasingly difficult to make a decision but because of my item 1) above I am leaning towards a Shimoda with its tripod carrying pouch
Any thoughts would be appreciated as I am thinking of a refresh of my f stop Loka which I have had for over 6 years and has a broken clip on one of the straps.
Is your sole consideration, after comfort, bodies / lenses it can hold or do you place importance on " accessories and other items "
For me these would be.
1) It needs to be able to have a tripod attached for carrying...my tripod is 67cm closed without an head.
2) Carry a water bottle / snacks
3) Space for waterproof jacket and fleece & travel towel
4) Space for filters & adaptors / holders / viewing loupe
As for packing, do you reconfigure it every time you go out, assuming you do not take everything ( that would be too heavy for me ) with perhaps having several, what f stop calls icu and Shimoda core unit just swapping them out / in ?
There are so many options available these days it is, for me, getting increasingly difficult to make a decision but because of my item 1) above I am leaning towards a Shimoda with its tripod carrying pouch
Any thoughts would be appreciated as I am thinking of a refresh of my f stop Loka which I have had for over 6 years and has a broken clip on one of the straps.

Two criteria I add:
1. Aircraft luggage compatibility
2. Proper waist harness to help off load the weight of the bag off my shoulders
I have essential kit that I have the bag configured for 99% of the time, and some additional kit that is easily swapped around when needed. Very, very rarely I will completely reconfigure the bags interior to take my 120-300mm f2.8 lens with body attached.
The bag I am using currently is the Lowepro pro tactic - I've used it now for approx 18months and consider it the best bag I have owned.
1. Aircraft luggage compatibility
2. Proper waist harness to help off load the weight of the bag off my shoulders
I have essential kit that I have the bag configured for 99% of the time, and some additional kit that is easily swapped around when needed. Very, very rarely I will completely reconfigure the bags interior to take my 120-300mm f2.8 lens with body attached.
The bag I am using currently is the Lowepro pro tactic - I've used it now for approx 18months and consider it the best bag I have owned.

Over the years I have had/used several camera bags, some of them quite expensive but I always seem to return to a hiking back pack. My current is an Osprey Talon 22. I tend to take only one camera with lens and a couple of extra lenses at most. There are two zip pockets on the waist belt for spare batteries and cards. I then hook one of the tripod legs over the waist belt where it attaches to the pack. Add in a spare warm top, waterproof, snacks. Hiking bags are designed for comfort and carrying and don't shout out about what they are carrying.

I have a sensible Lowepro with separate compartments for camera kit and for water bottle / oddments of shopping etc.
But I also have a pink flowery Cath Kidston rucksack that I have fitted out inside with foam rubber. It's much lighter than the Lowepro. It holds a camera body, a couple of lenses, the flash gun, with a separate pocket for small items. The advantage for me is that it doesn't scream out 'There's several grands worth of kit in here...' I got the idea from another member here.
But I also have a pink flowery Cath Kidston rucksack that I have fitted out inside with foam rubber. It's much lighter than the Lowepro. It holds a camera body, a couple of lenses, the flash gun, with a separate pocket for small items. The advantage for me is that it doesn't scream out 'There's several grands worth of kit in here...' I got the idea from another member here.

My requirements would be - quality materials, good padding, mesh pockets (Tamrac) inside and............very good quality zips. I'm not too worried about waterproofing as I never go out in the rain!
Current bags. Tamrac evolution 8 (for my S*ny a7) and Billingham 225 for the infrared Panasonic GX7 camera and lenses.
Current bags. Tamrac evolution 8 (for my S*ny a7) and Billingham 225 for the infrared Panasonic GX7 camera and lenses.

I've carry a 17 year old heavily faded LowePro bag so it doesn't scream I contain lots of expensive kit
It's got a lower compartment with padded seperators and a bigger upper unpadded compartment. The lower compartment will stow a medium size DSLR+lens such as a 5DIV + 24-105, or a a big DSLR like a 1DX, + peripherals like lens cleaning stuff. The upper compartment can take square filters, a medium, sized zoom lens like a 100-400mm, a big flash gun, manuals (+ food and water at a pinch). There's a front zip pouch which I use for cables and memory cards.
Fully loaded it can weigh up to 10kg, but it's got good shoulder straps and a belly strap. Basically it's a small back pack for cameras. I got given a bigger one, which was large singe compartment with loads of dividers and a stiff exterior, but you had to lay it flat to take anything out, and it was as bulky as a small rucksack, so it spent most of it's time in the wardrobe.

Fully loaded it can weigh up to 10kg, but it's got good shoulder straps and a belly strap. Basically it's a small back pack for cameras. I got given a bigger one, which was large singe compartment with loads of dividers and a stiff exterior, but you had to lay it flat to take anything out, and it was as bulky as a small rucksack, so it spent most of it's time in the wardrobe.