I don't enjoy shooting .308 all that much. I prefer rifles that don't hit hard. I'm not saying a .308 is a shoulder buster, but it's night and day compared to a 5.56. Also with my 5.56 rifles my wife and daughter can enjoy them too (they like the Acog as well).
Nice thing about .308 is they'll turn a lot of cover into concealment. It's better if you don't have to carry it and the ammo to far too do it though. My AR10 is a heavy pig.