I was practicing the melodic minor scale and then the locrian mode today, and to be honest, both are at best mildly unpleasant. In fact, locrian is just nasty.
Just before I packed up I blew something simple that sounded nice and thought, that sounds familiar. I realised it was a Coltrane tune, Spiritual. Not that I’ll ever be Coltrane, but it’s a beautiful thing to play.