Ok, my .02 cents, and as a mod on another forum says, "others mileage may vary"
I never had a serious complaint with the M16 system. Carrying one for a living, I thought it was a great weapon. My only complaint would probably be the star chamber, as it is a difficult area to clean well. I never had a weapon induced problem with accuracy, if anything my marksmanship suffered more from the PASGT helmet, which had a tendency to kick forward in a prone position, making it difficult to get a good sight picture. If anything, the M16 system takes a lot more training to use than the AK series, but that is the nature of the AK, mass exportation to advance the Communist Revolution LOL. I think the best thing the Army ever did, in regard to the M16 was to go to the A2 and later iterations, with the heavier barrel. the Rear sight is a bit more complicated, and to switch to the Advanced Combat Helmet which has a better profile for Basic Rifle Marksmanship. All in all, I rather miss my weapon, but must admit, not shooting regularly anymore, and the only weapons i own (a P.53 Enfield, Henry, and 1849 Colt Pocket) are for reenacting, I dont really have a need for an M16/AR15.