Pablo Massa wrote:

>...  A few months ago, I got a score of Schubert's "Gute Nacht" (I from
>"Winterreise") in a tenor voice version, in d minor.  As I have a dark
>baritone voice (and poor vocal resources...), I found more natural and
>comfortable to it in c minor.  However, it wasn't only a matter of
>comfort:I thought that this key was more fitted to the song, given its
>general character and text (which is, of course, a merely subjective
>opinion).

Winterreise was originally written for tenor voice.

P.