I prefer running distilled water/rust inhibitor in the summer and for storage green antifreeze 50/50. Simply and only because if a problem develops like; a leak, overheating through an ill fitting radiator cap, or steam you get antifreeze all over the engine bay and the outside of the car. Even inside the car if your at road speed with the front window open. A real mess, and can damage paint For those As in good enough shape this will never happen, antifreeze is good.
When draining antifreeze in the spring I save it in the original container. Then use it again in the fall when storing the car. Every year or two I add a bottle of rust inhibitor to ensure the rust inhibitor stays fresh.
I read somewhere if you use antifreeze, never mix types (green, orange, etc.) nasty things happen to the coolant. If you do want to change types you must thoroughly flush/backflush the cooling system after draining, and before filling with a different type.
Thats what I do and why.