A couple of my coworkers and I talked about this once as we occasionally work with customers and vendors in the States and overseas. One of the things that we identified us saying was "Eh" (think McKenzie brothers).

Slightly off topic but... I was in the UK working on a project and was trying to explain something over the phone to someone in Scotland and they ask, "I'm sorry, can you repeat what you just said. I'm having trouble understanding you through your accent." Of course I had to giggle at that because I was having trouble understanding him and wanted to say, "Damn it. I don't have an accent. You have the accent."