surfgeorge
Member of the Trade: 3D Printed Accessory Designer
if you are serious about this hobby, one thing I would very much reccomened is, from time to time go to a classical concert - in a properly tuned concert hall if possible -
and just listen to everything carefully - the lows, mids, highs, the balance, timbre, the feel of the notes
Im saying this because what I am looking for and maybe what everyone is looking for is that 'perfect' headphone that replicates how acoustic music for example not
only sounds but feels in real life. Ive had this experience a few times and it is extraordinary!!
This is a really important point - what reference we are all using, and I wholeheartedly agree with @jon parker that classic concerts are the ultimate reference. The complexity of the huge range of instruments, brass, strings, flutes, drums etc. is maybe the toughtest thing to reproduce. The closest IEM sound I heard to a real performance in a good concert hall was the JVC Victor HA-FW10000. That was impressively real.