Hmmm thats interesting
A beautiful, flowing, rhyming song can be a huge plus...
But, to me, the way the words in a song flow doesn't affect me quite the same, as if I am reading a poem
A song can be beautiful, regardless of the words.
Also, I would usually write repeating lines, or a form of chorus in a song
While usually in poetry, I don't like to repeat the same line more than once