For mixing, mastering, monitoring, and plain listening I prefer the long-discontinued MB Quartphone 90 and 95 (they are now being produced under the "German Maestro" brand). Very comfortable on the ear, very transparent-sounding.
For live and studio use I also have a Beyerdynamic DT-770 which is nice because it shuts out ambient noise quite effectively but I think itīs a bit -mid-heavy and very tight on the head so after an hour or two I get some hearing troubles and a headache.
I used to have a Jecklin Float some years ago. Nice as it was, it was quite, erm, impractical to use (espcially in the studio).