Work people, if you bring a laptop, binder, etc, do you prefer a backpack or briefcase?
Are you a male or female? How do you commute to work? If I was a male = I would select a backpack If I was a female and I commuted via public transportation = I would choose a back pack. But if I drove, I would use a briefcase. As a female and travels significantly for work - I've found a great briefcase that is fashionable and works with female business attire. But it is small enough that I can put it into a backpack when I do plane or public transportation.
real estate guy
I wear a suit, but still use a backpack - granted, it a nice one, but it carries so much more.
I travel a lot for work, so I use a backpack because it offers more space and flexibility than a briefcase would. When I don't travel, I often commute on the train, and backpacks are by far the preferred item for train commuters to use/carry. If I was a driving commuter I would probably carry something different as a bag.
Briefcase. Never could or would want to wear something on my back other than a shirt and jacket.
I carry a computer purse.
Briefcase. I have back and shoulder issues, and backpacks do me no favors. I believe they can actually cause such problems. I also think you can't fit things into them as easily as you can a briefcase.