I find that "I mean" has become the new sentence starter, replacing "um" and "so" and "like".
If you've never noticed it before, it'll drive you nuts now.
The one that's a real pet peeve of mine though is the made up word "nuther". As in, "well, that's a whole nuther thing". It's either "a whole other thing" or "another thing" but not "whole nuther".
I'd argue more about it but the point is probably mute.