High PP or 2 big cards

When you have high pp (QQ,KK,AA) or when you have two big cards (AK,AQ,KQ) and are entering the pot first the most common play is raise or 3-5 bb depending on the table. Lets say you get 2 callers how do you play the flop when:
High PP and no over cards hit i.e. KK on T high board
High cards and you hit top card AQ flop Q75
High cards and you miss the flop AK flop J82

What I am asking is do you vary your flop bets or do you keep a consistant 3/4 to full pot in each situation so you dont tip your hand.

Your question is too general.

In general, it's best to keep your bets similar whether you hit or miss. This will make it harder for opps to put you on a hand. Depending on what level you play, your opponents will act differently to your cbets. At higher levels, they will reraie you even if they miss. If you call or reraise, they know you probably did hit. Otherwise they just stole the pot if you fold. Sometimes they just call your cbet and see what you do on the turn...or they will lead out the turn.

Rondavu is pointing out that the number of players, the type of players and your image (and other factors) can help determine what to do.

think about the good case first:

Overpair... is it 2 suited? 2 connected? or 3 suited/connected?
how likely is the straight holding / straight draw holding?

bet accordingly. You should generally not bet less than half a pot, and usually bet 3/4 pot, and bet pot if there are 4+ players.

now the overcard miss case or the big pair overcard case:

what are you trying to represent?

how much would you bet if you had what you're representing?

bet that much