I have an AR, but my other .223 is a bolt action which is mostly used for prairie dog shooting. Depends on my mood. But, I figure that the AR is a better social gun.
Going to deer camp in the back country, I'll take my .243 as a sort of backup to my '06, "In case of in case." But, either one is a good hunting rifle.
The word "diversity" has never entered my mind in thinking about buying or using a rifle. I think "purpose" and after that I might acquire some additional rifle.
You're from BATFE? Come right in! I use all your fine products!