My guilty pleasure is any of the clones of the iSK MDH9000 closed back headphones. I’ve owned 4 pairs of various clones, gave away 3/kept one. My favorite of them is the Marantz MPH-2.
This is ChiFi at its best: inexpensive (my MPH-2s cost $50), comfortable, musical, with very ear-friendly treble, a punchy (tho elevated) bass, and shockingly good soundstaging for a closed back.
I use these + the humble-but-good FiiO e10K amp/DAC when I travel.
Every time I put these on, I’m filled with doubt…how could they possibly sound good compared to a ZMF Ori, Aeolus, HD650, others? Then I relax–they sound very pleasing, just as I remember.