It depends.
If I'm playing a game that has little to no overarching storyline or plot and is just one big excuse plot (think Bad Dudes), then I'm fine with the guy or gal I'm playing as having no notable dialogue (not things like exclamations).
However, If I were to play a game that was intended to be at least somewhat story and/or character driven with things like long dialogues and cutscenes, then the person I'm playing should I have a acceptable amount of dialogue, unless he/she is actually physically incapable of speaking.
If I'm playing a game that has little to no overarching storyline or plot and is just one big excuse plot (think Bad Dudes), then I'm fine with the guy or gal I'm playing as having no notable dialogue (not things like exclamations).
However, If I were to play a game that was intended to be at least somewhat story and/or character driven with things like long dialogues and cutscenes, then the person I'm playing should I have a acceptable amount of dialogue, unless he/she is actually physically incapable of speaking.