The default font for Word is times new roman. I change my default to palatino, which I think looks better on the screen and page. One journal required me to submit in times new roman, so I did, but I was irritated.
What are your default settings? These might be largely unconscious, so you might not even be aware of what they are. It might be the use of the passive voice: "In this essay it will be shown that..." It might be certain authorial stance, a certain length of paragraph or sentence. One colleague I had once ended every paper with a section titled "conclusion." One grad student in his dissertation introduced the name of every proper name with a qualifier: "Cultural critic Edward Said..." "Literary theorist Jacques Derrida." That was damned irritating.
I distinguish two kinds of default, functional and dysfunctional. A functional one works well for you, like palatino for me. It is a comfortable habit that does no harm and reduces the number of irrelevant choices. I know approximately how long a paragraph I like to write, typically, and I am comfortable staying with that in most cases.
Dsyfunctional defaults are those that get in the way. They are bad habits that the writer is not even aware of. In some cases, like ending every article with a section title "conclusion," there was no real harm done. In other cases, though a default can show a certain unmindfulness. Introducing every single proper name with a description of who they are is irritating, because the writer has not chosen to do so when appropriate. Maybe she was reading too much Dan Brown.*
*The first sentence of a bestselling novel by this author is "Renowned curator Jacques Saunière staggered through the vaulted archway of the museum's Grand Gallery."