It should be every player's most profitable hand even though sometimes we will lose big pots with them. The key is to know to slow down.
Preflop, AA = best possible hand. Post flop, it's often just an overpair.
You need to learn what board textures favor your AA and what doesn't.
When faced with aggression from opponent after you have shown aggression, often it's better to slow down unless you are up against absolute dummies.