I was just recently informed that I was successful in securing a role that I applied for. I've been described by some as "intensely literal" which thankfully hasn't worked against me in my last couple interviews but I do want to improve on my interview "skills". I'm wondering how unusual would it be to ask for feedback on how I could have interviewed better? I'm mostly interested if there was anything that raised flags or concerns so I know to avoid that in the future. At the same time, I don't want to raise further flags by asking a weird and/or unusual question.
EDIT: For posterity's sake I decided to post an update. I decided to go ahead and ask for feedback. The question did throw them off a bit but what they mentioned was beneficial. Without getting into all the details, the main thing I was concerned about was that I downplayed my skills too much and didn't give myself enough credit. Their feedback suggested that their takeaway was that I was honest and fairly perceptive of my own skills.