Describe yourself in three (or four, tops) adjectives. Now, make sure those qualities are coming through in what you write. If you’re funny, your writing should be (at times, at least) funny. If you’re erudite, that should be there. If you love pop culture, that should be apparent.
If those qualities are not coming through in what you write, start working to make sure they do. Use what makes you special and weird. Be you. As Dolly Parton said, “Figure out who you are, then do it on purpose.”