My neverfull - I originally bought it as a diaper bag 7 years ago and I find myself using it whenever I need a tote bag big enough to carry my knitting... I use it for traveling and at my kids baseball games. It’s not my favorite bag that I own- I actually contemplated selling it last year, but I realized that was a bad idea because it is such a work horse!
Most used is probably my Balenciaga Hip bag. It is just very easy to throw crossbody and then go, the design is very versatile, and it holds a lot. However, my Saint Laurent tote might be catching up, since I use this as my work bag.