Villain unknown playing 43/21/5 over about 200h so propably recreational. Hasn't 4bet or cold4bet so far. 

If we manage to pot/gii with bare AA flipping I'm fine but not excited and rather would make him fold those, don't remember timing tells so can't tell whether he might be slowplaying AA+NFD here, but if he is we're in very bad shape.

I read the post from midori http://www.runitonce.com/plo/ppt-case-study-1-aa-in-4bet-pot/ so nowadays I think checking back here has many merits for us, especially with lots of backdoor stuff going for us.

Back in the days I was either going with potting or betting very small here which in retrospect isn't the greatest other than we can get away if he c/shoves so gonna have AA+ better FD a lot. Nowadays I'm debating pot/calling or checking back, put SPR is kinda ugly for us in both cases unfortunately.