Well, I thought it would be a cool option if our character could talk to himself by engaging in dialogue with him. I am not necessarily talking about "talking" to yourself (e.g asking questions and answering them), although if there were several dialogue options it could be one of them. Mainly, however, I thought that our character could, after establishing such a dialogue, say a thought aloud, something like "I have to remember to avoid deadly traps. Death would really spoil my day." This could be a nice diversion to the solo game, and when roaming with a party, party members could sometimes comment on the character speaking to each other. For example, worrying about her or mocking her or whispering to each other about this little quirk.
I don't know if something like this is already in the game, but if not, I think it could be useful. And sorry for my bad english.