Why is it that out of all the string sets I have played in my lifetime (48+ playing years) the 'D' is always the best sounding string and the longest lived? I don't even like the key of D. I especially detest Db minor. I don't mind playing D as part of a happier key such as G or A, but D is just the Devil & damnation. Darkness. Whereas vitamin D is all sunlight & carrots.