While I'm not a fan of Sig bags, maybe because after almost 15 years of authenticating Coaches I've just seen too darned many fakes of them including many REALLY bad ones, something that's super-practical or even a bit whimsical can still be a "keeper". A Signature Optic pattern or a multicolor Scribble design is a lot more fun to me than a standard Sig.
Just a few favorites, the bags are still in my collection even though they might be as much as 15 years old, and I still use them, Set the Wayback Machine for 2005 or thereabouts:
F70283 - Voyager Mini Sig Small Messenger, 11x10 inches, a perfect size that can handle anything up to a decent size tablet and enough outside pockets to keep even me happy, and they're
all big enough for a phone.
2173 - Chelsea Sig Optic Hobo, 2005. Mine is actually a Denim Blue combination.
and a few of my favorite Scribble and Scribble Stitch styles:
6075 - Scribble Pastels Baby Bag from 2005, my favorite Road Trip bag, tons of room inside for a windbreaker, umbrella, water bottles, books, maps, (yes, I still use them), and when you're someplace where the only places to sit are either damp, dirty or moss-covered, that waterproof changing pad is a lifesaver.
and my favorite, 1855 - Scribble Stitch Pocket Flap from 2004. The Cs are actually embroidered on with thick, silky thread. It's just a fun bag,
(Whoops, sorry about the duplicate pic)