Has to be appealing to the eye, don't want to look ugly on the course. For instance, the one above with this 'Spuzz' word on it - ugly as blue shoes that is! 😋
I walk as well, so weight is a big factor. Not the lightest weight though - have to strike a balance between functionality, durability, and weight. The lightest weight 'sunday' bag was just too limited - clubs hard to get in/out, etc.
I like the balance and leg operation of Sun Mountain.
I like the club and pocket configuration of some Ogio bags.
My latest favorite is a Ping Hoofer I got last year (same model this year too). Seems to combine the best of the above. Not exactly light weight, but makes up for it in durability. The towel loop wasn't large enough so I supplemented it. Only one loop too, so someone like me with lots of gadgets I had to supplement that too - but I'm not the norm (larger towel loop, club brush, pocket for phone/scorecard, range finder, bluetooth speaker - a carabiner did the trick).