In Japan, there are many dialects, which could be in the same position as English accents. First, I did not know that America also has a variety of accents between the states, so I was surprised about that.
For the discussion about which of the accents are the most trustful, I thought that how is it trustful does not relate much, but the scene that we use changes a lot. For example, the newscasters on the TV uses the Tokyo accent, and we often prefer the Tokyo accent on the formal scenes. However, Osaka and the other accents have an image that is approachable. It is useful in communication with close persons. I thought the prefered accent are the differences between the scene.