Sometimes electronic artists "drift" for too long, and seem to lose focus... a sense of direction for their song. That's especially hard for those who craft ambient music, a typically slower, somewhat more repetitive type of music.
Just because ambient music is generally atmospheric, doesn't mean it can't be melodic; and Hollan Holmes is a master of the art. There's always a unique, interesting angle to his musical creations, and I'm sure that's not easy to do. I enjoy all of his albums!