Quote Originally Posted by daviddem View Post
You adjust your 3b size according to your position, not according to your hand strength, so how are they supposed to tell if you have a big hand or not?
This.

Also you adjust your preflop 3 betting ranges according to villains pre flop tendencies, if he's calling a lot of 3bets you should look to exploit this by 3betting for value only and rarely bluffing, but widening your value range.

If he tends to fold to a lot of 3bets i.e only continues to a 3bet with a very narrow and strong range, you should look to exploit this by 3 bet bluffing more.