I have 9 keys I carry with me daily and I find the 6 key holder is my most used LV item. These are the keys I might have needs throughout the day - my home, my parents apartment, my parents house, my office, my bank. I used to carry my car keys there too but it was too bulky.
I've got a key pouch with just 2 keys for my home. I use it when I go out and need just a small key/card/cash holder to fit into my tiny clutches.