First in Mid-Late position raise at least 3xBB or fold unless you have a small pocket pair. In that case limp and call a raise for an implied odds shot at a set if you both have a good stack.

Like Rilla stated, you're way too weak-tight. Poker is about position and representation. Think about when a flop comes out 2 5 5 rainbow. From then on, assuming no one hit anything (which you would), you bet as if it's still preflop. You bet the strength of your hand against others blind. AQ would still be boss on this flop if no one has a pocket pair.

Raise your AQ every time. If it gets reraised behind you, then just call if it's not too deep to see a flop and play cautiously. A reraise could mean JJ QQ or KK, in which case a flopped A trumps it anyway, so it's worth a look see.