I part mine down the middle

well actually, I don't do anything - my hair just does it naturally and any attempt to move it elsewhere fails haha and it works for me and my face shape so I don't mess with it. I have very thick but fine German/Chinese mixed hair that's layered and goes down to my mid-back.
I do notice that the middle part is getting more popular. People say it looks more "boho" and yet others say "severe"...though whatever the description it tends to work better for people with very symmetrical faces (as the part draws an imaginary line down your face so anyone whose face isn't symmetrical may look a little odd. It also tends not to work for people that have prominent noses as it may highlight/be unflattering for a larger nose)