Big bags everywhere ! More space in inventory, toolbelt, logistic and trash slots, robots cargo size and speed, bigger stacks & pickstick to increase your picking distance...
A water well pump, to pump water from the groundwater table.
Most likely automatically fills in things properly, probably. Preferrably both fuel and ammunition, if possible.
2x2 lamps which cast a wide, soft glow. An electric lamp, fully signal compatible; a copper lamp which burns solid fuel; and a floor lamp which can be walked over. They line up with rails and large power poles.
Start with Power Armor, Roboports and Robots. Compatible with other mods including Bob's Warfare/Logistics/Personal Equipment and Krastorio 2.
Lets personal construction bots save energy and time by building and deconstructing close things first
Dig a hole to get some landfill, resulting in a hole of water. Then you can replace the land somewhere else...