Bag-in-a-box Icon: would be like a cheap wine bag-in-a-box with a handle Click the bag-in-a-box to open a 9x9 inventory box (like Lutefish Cube but doesnt transform stuff put into the cube) I very often find that I run out of space and would love a way to put the stuff I rarely use but must bring along so I would absolutely love a space to place stuff like anvils or alchemy bench - or even a place to put all those muchrooms or food or whatever. It could also be limited to a certain kind of items like booze or food or mushrooms or ingots or whatever.
I'd be happy with a bag that could only hold basic crafting materials: ingots, tinkering parts, burned out wands, gems, etc. The lack of inventory space is most notable when you take a crafting skill. Especially if you take more than one. In a play-through where you don't take any crafting skills, the inventory size is comfortable. It's limited in order to add a challenge to the game. I think that should be preserved, but it doesn't work well when there are so many different crafting materials.
I'm thinking of the Pokemon system, myself. For those unfamiliar, you get a bag that has compartments - one for programs, one for berries, one for healing items, one for equipment, one for "key items" (aka artifacts), et cetera. I'd love to see the Dredmor rucksack have tabs, with ingots in their own tab, potions in another, weapons and armor in a third, reagents in a fourth, so forth and so on. An artifact tab would make it so much easier than playing "One of these things is not like the others" when I get to the Eyeball Shrine and start rooting through my inventory. Then again, maybe easier isn't a good thing.
Having seen the success of the tab system for the crafting interface, I'd love to see the same basic idea applied to the inventory. "Reagents", "Consumables", "Equippables", and "Other" would be blazingly awesome.