Probably not a popular shoutout but I love the dialogue in Summer Heat.
I really feel like they convey the characters well through their dialogue, most of the characters are awkward teenagers so in the early game it's clear they've got that style of writing down, but recently they've expanded the cast of adult characters and the natural, character focused dialogue has remained consistent.
Friends in Need. I find it has the most realistic and grounded dialog. Maybe Defending Lydia Collier too. Their conversations are just natural.
Every other game has very weird dialog, c'mon, no one does conversations like that in real life.