Probably get crucified for this one. AR-15's. 2 different kinds, one had to get the barrel replaced right away because of poor accuracy (under warranty). The other stopped cycling after about 200 rounds, BCG replaced under warranty. These weren't chinese norincos either, 2 reputable brands. Honestly from what you would read from everyone on here they are 1 MOA guns right out of the box and the best guns since sliced bread. Accuracy is on par with any other semi .223/5.56 I have shot, honestly I wish I hadn't sold my X95 it had the same accuracy as the AR's using bulk ammo. So in summary maybe a high end AR won't give you any problems and maybe better accuracy but don't expect run of the mill $1-2k AR's that don't need maintenance, upgrading, tinkering or repair. Oh and the regret is that I have these useless AR's that are now prohibited.
I feel the same way about my AR. Maybe if it was what I learned on and I sunk a lot more time into customizing and tinkering with it I might enjoy it more. But my guns are like my vehicles and desktop computer: I don't want to spend tons of time building and working on them I just want them to work. All that customizability can be a double-edge sword.