We need more colors of bags, but I’d also like to see bags with different patterns, and maybe even symbols to help us better sort our stuff. I don’t hang on to that much stuff, but I do try to keep it organized so I can find stuff faster.
Some ideas: Patterns: stripes, spots, plaids, swirls (would love some with the pattern of butterfly eggs, both in the butterfly egg colors and in other colors.
Symbols: Milk bottle, vegetable of some kind, cherry, seed packet or herb seed, piece of ore or a pick, shovel (for loam/dirt/peat), barnacle or jar of fireflies, (or scraper), bean, bubble, gas bottle, stack of three ingots, guano
Colors: PURPLE, orange, black, white, red
Other container type ideas: Baskets, cauldrons, knapsacks, magic lamp, boxes (ornate, cardboard, crates), magic gem, pillbox, chests of various sorts, barrels, gourds, small bottle tree husks, faberge style eggs, magic ring
There could be a specialty bag vendor located in an out-of-the-way location to make it more challenging. In addition or instead, vendors could carry bags that have symbols related to their professions. Some bags could be obtained only through quests, sort of like the Jethimadh tower quest. Finally, some could be crafted.
One thing I don't think people would want more of, but comments may reveal differently: containers that are restricted to only one type of item. So, even if a bag has a picture of a cherry on it, for example, I wouldn't want that bag to ONLY allow fruits. Alternatively, perhaps these bags could have switchable settings where it can either act like a general carry-all OR you switch it to be a specific item type going into it--and have said items go in automatically, just like spices in the spice rack.