I hear a lot of people in interviews answer a question with "Yeah..." even if it wasn't a yes or no question, or even if the answer is actually negative. "Tell us about how you got started with this." "Yeah, it was about 10 years ago..." I guess it's a filler word, and it doesn't bother me much when it's just an average person answering questions, but when it's someone who speaks professionally for all or part of their income... they should know better, and they should listen to recordings of themselves to help themselves improve.
The above isn't even a terribly egregious example. It's amazing how many "ums" and "uhs" and "you knows" and other absolutely irritating verbal tics I hear from professional speakers!!
On the other hand, I also hear people say "no" when they mean "yes" -- even something as blatant as, "These are the best tacos ever!" "No, I totally agree!" And then there's "Yeah, NO." That one apparently means "no" despite the "yeah" at the beginning. Le sigh... I'm a native English speaker, and I find this annoying. I can't imagine what someone who's learning English must think!