MMMbye is really annoying, so is bye now! I love the midwest accent though, especially Minnesota or Wisconsin. I live an hour outside of Boston in NH and the Mass accent is horrible - I like to think I don't have a New England accent but certain words I catch myself saying, especially if it ends in a "g" then I tend to drop it, ie, frickin, walkin, etc. Boston is home of the silent "r", paaakin lot, cah (car), chowdah, beeah (beer), wicked awesome!(don't hear that one too much anymore though).
There's a Pittsburg/ Ohio thing that my husband does - he's not even from there but his family is - he'll say things like, "the car needs washed" or worse "the garage needs cleaned" UGGG! It drives me nuts!