I also found out that the length of words and lines in lyrics, as well as the content of the lyrics, steers the direction music will go. Notice, I didn't write music that was extremely different, but it wasn't the same either. The content of lyrics only steers the musical ship in a direction. The exact place that ship lands could be different depending on the day you are writing music, but you'll still end up in the same country. I think I subconsciously write music to match the lyrical content, and the length of lines determines cadence, timing, rhythm, etc.
Musical influences are different for everyone. And the instrument you play is probably your biggest musical influence. That instrument has qualities that limit your creativity to be focused in a certain direction. I used a guitar instead of a piano, a
Personalities can never be the exact same in any two humans, and I believe songwriters write songs as unique as their personalities. If one person writes the lyrics and another writes the music, you are essentially blending personality and experience of both writers. This can create some interesting mixtures. Collaboration is a beautiful thing.