Why do solos sound different in different types of music?

I play guitar, I don't know much about theory, big surprise, I know. Most of the music I play is blues based rock, so Im always trying to end phrases/ solos on the 1 or 5th note of the scale. But honestly, Im usually doing that by ear and I don't know what note Im ending on, I just go by sound. My question is why does soloing in different types of music sound different? ln bluegrass or country or jazz or metal, not only does the music sound different but all the lead melodies sound different, why? I hope this isn't too general of a question, but thanks for any responses.