I play a lot of The Long Dark. Here the character talks occasionally. For example when the backpack gets to heavy, the character complains the heaviness of the “pack”. Or if the character has pain he/she constantly makes aching sounds exprains his/her pain. This integration is a clever way of feedback in the game making the player more immersed.
I think something like that would do very well in GZ also. The icons, bars and texts are all in the corners of the screen making it in a combat situation not always realizing what’s going on. Also I usually recognized that the char is overencumbered if I want to run of fast travel.
I think a male and female voice for the start would suffice and adding more later on maybe in different languages as well (although I would set my char to speak Svenska of course ). Expressing joy when defeating an enemy pack, weight-based expressions, phrases when being hurt could be a welcome addition to the game.
I wouldn’t need phrases like “there is an enemy nearby” or else since this would interfere too much with the game mechanic (maybe for adventure this would make sense).
What do you think? Do you want a more talkative char or do you prefer a silent one?