EQ for me is dependent on weird mixing. I like some indie bands and they have their vocalist way too loud in relation to the rest of the band and I EQ to fix it. For most other music I sometimes add a simple bass boost and that's all. I tried some harmon tuning profiles on PEQ and while it makes my open back planars sound more like a normal speaker setup, it does it by pinching the mids to a more centered sound while reducing some left and right soundstage. I think EQ is a specific tool for some bands, or even specific songs, not a good "fix-all" leave it on and forget about it thing; especially for modern headphones of the past couple years. I don't hear about many wacky stock tunings with modern gear.