I've experienced this "circle fatigue", but it's mainly because the service is new and I'm adding people to my circles on a daily basis as they get invited so i

I've experienced this "circle fatigue", but it's mainly because the service is new and I'm adding people to my circles on a daily basis as they get invited so it gets kind of irritating having to think which circle 10 people fit in everyday. Once more people come on I don't think it'll be much of an issue? I get like one FB friend request a week so if G+ is similar and I have to put someone into a circle once a week I don't think it's an issue. Also, if someone doesn't like using the circles then what is stopping them from just putting everyone in one circle?