I wouldn't recommend playing Witcher 3 in small doses. You'd be liable to stop playing for a while, then you'd come back to the game forgetting what the hell you were doing.
My Witcher 3 playthrough was at 100% excluding hearts of Stone, which I have yet to play. I've been going through Fallout 4 in anticipation of
Point Lookout Far Harbor. I'm playing on Survival mode with a few weapon and armor mods. Survival mode definitely makes the game better, though there's no fixing the shit story or bad dialogue system. Hopefully I'll have that done so I can go back to Wither 3 for Hearts of Stone and Blood and Wine. Blood an Wine looks insane.
Edit Creeper pls understand.