I'm jumping in just because. I really love my A2. I have had it for about 30 years and it just plain shoots. It is an old Eagle Arms that I bought before the Clinton AWB.
I have a few different AR's set up for different things, but honestly this one is my favorite. It is simple, it is very easy to hit out to 300 + yards, and doesn't have much extra stuff to go wrong. The handguards work well for my largish hands and the rifle length gas system makes it a smooth shooter. I am still blessed with pretty good eyesight at 52, so as long as I can get by with the irons it will stay this way.
There is just something about a good A2 that smells like victory.