The world I have been playing on for the last few weeks is a modded, Direwolf20 1.12 modpack world.
The first picture is my main room, and yes, this is a cave house. I have chests and storage drawers, chests for more numerous miscellaneous items, storage drawers for many items of one kind.
The second picture is my kitchen, with storage drawers for Pam's Harvestcraft foods, and also Cooking for Blockheads appliances.
The third picture is my Actually Additions ore processing, and the double chest there is all processed ores.
As you can see, I haven't finished off any of these rooms yet, but I like to make rooms for each mod, and usually have some type of storage in each room also.