Best sounding headphones you have owned?

My favorite open back headphone is currently the Amex Elite. For closed back I go back and forth between the Focal Stellia and the ZMF Verite Closed. I listen to headphones mostly in bed so I used my closed more than my open backed. 
 

John

For at home listening, Sennheiser HD700's...When traveling Sony WH-1000MX2's... now moving to 4's.

I have had many HP. IMHO the two best I have ever enjoyed was Susvara and AB 1266. what amp drive them however is very important to have their full experience.

Anything from JM Audio Design - John Massaria is nothing short of a headphone savant.  

I was a soldier all my life & now retired so I've never had deep pockets for audio gear & being a firm believer in trickle down tech I have always looked to the manufacture's for the best value in their product lines.After extensive demos of the TOTL from Audeze,HiFiMan,Focal,Sennheiser,Grado & AKG I discovered I like the HiFiMan house sound,settling on the Sundara for exotic driver tech & the absolutely amazing iBasso SR-1 limited editions(500 pair)for dynamics...
 Where the Sundara is virtually dead neutral & fast as lightning,the iBasso is relaxed,lush,dripping with harmonic richness & tonal color that is not unlike the finest 300B amplifiers...