Out of Hash Table, Array, and INI-- are they all just as quick, and it comes down to your preference in how you like to store data?
I have a simple save system in mind-- the game saves when you leave a layout, I have maybe 50 variables to be loaded when you enter that layout again (locked doors, opened chests, etc.) Also a simple Zelda style inventory (either you have the item or you don't)...
Easy to keep track of no matter which data object I use.