Rick and Morty's Justin Roiland on how Rick's a changed man in season 6

gamesradar.com:

Rick Sanchez may be the smartest man in the universe – a status that, until recently, was protected by the Central Finite Curve – but he doesn’t tend to specialize in emotional depth. After the massive revelations of the season 5 finale, however, it’s now clear that he’s been grappling with massive grief since before we even laid eyes on him.

Thanks to 'Rickmurai Jack', we now know that Rick’s spent decades trying to come to terms with the death of his wife and (original) daughter, who were killed by a murderous version of himself from another dimension. The question is, how will this new intel change TV’s favorite misanthropic scientist as Rick and Morty enters its hotly anticipated sixth season?  

"Ultimately for a character like this, it isn’t going to change him," Rick and Morty co-creator and voice of Rick Justin Roiland tells us. "I just think it’s letting the audience in on a little bit of maybe why he is the way he is."

"Rick’s been carrying this [grief] all the way since the beginning," he continues. "He’s just buried it deep and he’s built up walls. Maybe some of those walls are crumbling a little bit, but I think there’s this idea that you don’t want to be in a position where anyone who’s in your life could hurt you, so you build the walls up and you don’t let anyone get too close emotionally. 

"Because when you have to deal with loss – which we all will [do] or have [done] – it’s a very profound and awful experience. It’s just a fucking awful elephant in the room that we all pretend, I think, culturally isn’t a thing. But it is, and I think it’s unhealthy as a culture that we pretend it’s not real. I think that can cause people to put up walls [to try] and protect themselves, but ultimately, does it work?