You don't HAVE to categorize your friends, if you want you can just make one circle and throw everyone into it, then as/if you find need create separate circles

You don't HAVE to categorize your friends, if you want you can just make one circle and throw everyone into it, then as/if you find need create separate circles that are subsets to match those needs. G+ isn't perfect by any stretch, but complaining about being REQUIRED to categorize people seems... strange.