Lol I'm a meanie too then! We have a few clean up times. It drives me crazy to see toys on the floor that no one is playing with. I find that is how toys get broken or kids get hurt because they are tripping over things. I don't mind a mess if they are actually playing with the toys but I like to teach them that we put things away when we are finished because I find clean up easier that way. I also find it teaches them to respect and take care of things.
I get the point of having things out so the novelty wears off but I actually like the novelty. I find kids get bored and when I notice that, I do a toy swap. To them it's like brand new toys and I don't have to buy as many new toys! ( not like I don't tho, I'm always buying new things...it's bad! Lol) I have a yearly garage sale though and sell the things they are no longer interested in or have outgrown.