I'm not an experienced bag maker (yet), but I think it's a personal preference for the wearer: slingbag style versus handbag style. I like the straps attached on the side instead of the gusset (especially wearing cross-shoulder, sling style) for a few reasons: The bag lays against my side properly and comfortably, the shoulder strap doesn't interfere with the opening, and it doesn't look (as much) like a purse.