My Army basic training rifle was the M14. In 1967-68 rifle qualification with the M14 was done on pop up silhouete targets ranging from 50 meters to 500 meters, utilizing standing, kneeling, sitting, prone and foxhole positions. Iron sights, of course. I earned an Expert Rifle Badge. This is not me so much as it was an excellent rifle (and it had been used so much the parkerizing was worn off all the metal parts).
In a stateside artillery unit my issue weapon was, again, a well used M14. I qualified expert with that rifle as well.
I was issued an M16A1 for my Vietnam sojourn. I was not impressed.
Today I am the proud owner of a 1994 M1A that was built with USGI parts. It cost me $1600, which I consider to be well worth it.
I have absolutely no desire to own any AR of any caliber.
I have become intimately familiar with both the Armalite design and the M14 design, and for me there's only one choice.
This is a free country (for now, anyway) buy whatever you want. I did.