I use them in games if there aren't by default moments where you have to read the dialogue as text, otherwise I don't. And I only ever use them in games.
For instance in Devil May Cry games you don't have dialogue moments that aren't voiced.
But in FFX a lot of the dialogue, particularly from NPCs, isn't voiced.
So yeah I'll use the subtitles in FFX but not DMC.
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No problem!
This is a cute and pop genocide of love!