Hi guys, I just wonder which hands you should 3bet or play back against a regular that
3bets like 20%+ in headsup but yet almost never fold against 3bet himself?

I play on a site where we sit pretty deep (Usually 200+ bb) and I don't really feel that 3betting AJ type of hands is the way to go because even if i hit my ace i'm going to play oop with an Ace with only decent kicker and we're deepstack so i might just level myself into getting owned by AQ/AK/2pair hands, etc because he will be in the driver seat and i'll be here doing the guessing game.

So, just to clarify i don't play headsup regulary but i'm about to start, that's why I recently bought the elite membership to step up my game.

Feel free to just throw out your thoughts and try to go into details with it!
Cheers!