I totally get the comments about these all being a bit dull, but I have quite a lot of personality coming through in my appearance (hair, piercings, tattoos) so working in a conservative industry in the city, a more plain bag actually works well I think.
I also get the comments about one shoulder but I've used a tote and a backpack and do prefer a tote overall.
Also noted that a lot of people say Longchamp but they have a pretty bad sustainability record so not an option for me.
I think I'm going to try the Strathberry as a starting point and take it from there. They're not great on sustainability but not terrible and seem to be improving, plus seem to get mostly positive reviews, so I'll see how it goes!
Thanks so much for all the input!!