I've been upping the pre-flop aggression ante lately by 4-betting a significant amount of the time when ppl are 3-betting me light.

This is no big deal obviously, and is standard for a lot of ppl. It leads to some really interesting situations though.

Assuming that :
-villain is very aggro preflop and mediocre postflop
- has position on you and
-has been 3-betting more often than smooth calling your raises preflop

what do you when he 3-bets you and you hold :

-99
-AQs
-AA/KK
-rags (4 bet? how often?)

I ask because I find that since I've been at nl400 weird things have been happening (like 5-betting preflop w q10 and folding QQ to a 4-bet). I'm curious if most of you winners just find an easier table or if you have systematic ways of dealing with this stuff.