Oh boy, what a difficult question! This changes a bit over time, but I’ll just say what I’ve been using lately.
These choices above also represent the bulk of my current headphone collection, barring a couple of pairs I have shoved in my closet. Over the years of doing this, I’ve really narrowed down my personal tastes, and my headphone buying/selling habits have slowed down a bit. But I might be buying a new pair later this afternoon, so we’ll see if I eat those words, hahaha.