1) Often call vs tight predictable players intending to steal and often call vs loose players for value. Rarely call vs in between unpredictable players.

2) Calling and donking the flop and figuring out what the reaction means is a fine art. Try it against different opponents and see what they do. Most hands miss most flops so this can work well against the right opponent.

3) AQ is right at the bottom of the range you put him on so why 3bet? Youre in for a world of hurt if he takes a flop. If you want to get frisky Vs a tight player do it with 76s type stuff but against this guy its probably better to just let his AK take it down.