The Broadwood Temperament, popular in the 19th century is supposed to be making a comeback of sorts. Some celebrity endorsers etc. Maybe you would like the way it sounds.
Alternative tunings are not so much a matter of "detuning" as they are a matter of making different choices in the compromises necessary to tune a piano. In a sense equal temperament, by trying to be 'in tune' in all keys, guarantees that it is out of tune in all keys.
There is a CD by Enid Katahn called
Six Degrees of Tonality that explores alternative tunings. The last 3 cuts are the same Mozart piece played in 3 different tunings.