Re: KK in SB 0.50/1.00
 

OP has often said he plays at Everest, and Everest has a 5-bet cap, not a 4-bet cap. And when HU it's not capped at all.
Stats look very much like VP$IP/PFR/FlopAF/TurnAF/RiverAF, so I just went from there.

Preflop villain is pretty much screaming "I HAS ACES!!!!" yet for someone with decent aggressiveness-stats (although given his tightness, they're not all-out aggro), he just went into calldown mode postflop.
Is he fearing QQ, or is he fearing we have an overpair? His calldown looks fishy. If he has aces, he'd normally raise the flop. He didn't. So I'm not discounting AK, AQ and the likes. It wouldn't be the first time that a tightwad with only 1% PFR had some weird hands in his PFR-range.
Does OP have a read on specific hands he PFR'ed??? If he doesn't, that means he's not showing them down, so maybe he DOESN'T PFR aces and kings, but more exotic things like ATs and the likes?

As far as the hand itself, without other reads, I'd still go with a b/c-line for the flop, and if we don't get raised, keep at that, else c/c.
So I see nothing wrong whatsoever with the way this was played...