I had the same work bag for 8 years now - a large Radley bag and I've realized it's time for a change but I don't really know what I want.
What I currently have is a large Radley bag from the era when we all lugged laptops around all the time. The bag weighs a ton and encourages me to put far too much stuff in it - when I have clear outs it mystifies my why I'm carrying around so much paper. And I never did carry a laptop around in it anyway - tried it once and my shoulder nearly fell off 
What I'm looking for is a much smaller bag that I can still put A4 paperwork but a lot less to deter me from carrying around a small forest 
It's a professional workplace but not the sort of place where people will notice my designer handbag and I'll spend a lot of time visiting people's homes and in my car as well as being in my office.
Help me, handbag experts, what do I want?