It depends on a lot of things, the main one being the history at your table.
I'd usually advise to go for a big raise and only have big hands see the flop with you.
it is advisable to go all in on a preflop with AA pair or it is better to see the flop to get more chips
it is advisable to go all in on a preflop with AA pair or it is better to see the flop to get more chips