Like someone else pointed out, I hear the rhythm of raindrops in this. There's so much atmospheric quality you can pull from when making music around the theme of rain. Probably why I like it so much. It's immersive. Standing in a rainstorm is immersive, a good rain-themed song feels that way too, in some weird way. I could even picture the sound of windshield wipers in a song like this. So neat! This is good.
Music is your language. I can hear that.