I almost am out of space on my character. I have a few non-generic item holders (like the spice rack) but have probably 10 large-sized bags that are about to all be full.
We need bags that are twice as big as the large-size bags, so 32 spaces. Honestly, I'd even add another bag that is 64 spaces, and so on.
With so many items in the game, this just seems like an obvious option.