It's always fascinating to be reminded that I'm still basically ear-blind to certain linguistic patterns (the "pen/pin" merger being one I still can't even hear as different, let alone say). For a long time, I falsely assumed that because I grew up watching the same TV shows as the rest of the country, and because I didn't speak with the same accent as my family members, that I didn't have an accent at all. Turns out I do - I just can't hear it.