Probably making it sound masculine. Words and phrases can sound super feminine or super masculine, and sometimes I rephrase things because I think it sounds too girly. Sometimes I ask my husband to read it and tell me if it is something he would say!
Oh my Gosh. JUST WRITE!!! Listen, you're going to go back and reread that thing a million times. Don't be worried about what anyone else thinks or will think about it. Write for you!