Almost all people have idiosyncracies when they speak. Some people it's as simple as "uh" (observe Johnathon Demme accepting his Oscar) others repeat the same word or phrase constantly "ya know." Personally, I have a habit of saying "it's like" frequently and calling someone "dude" when I'm talking to them. After some training and classes I've stopped doing it in formal settings and do it only in casual situations. Hopefully, the substance of what someone is saying is more important than their idiosyncracies when speaking to a group.