Disclaimer these are just a small sampling of some possible writer traits I’ve noticed either in myself or in fics I read. Also consider a rb for sample size !
Sometimes it's useful to look at your dialogue and ask yourself, "would a real human being talk like that?" But it's also good to ask the follow-up questions of "would the way a real human being talks sound good here" and "does this character actually talk like a real human being or are they weird about it."