I have tried transposing complete songs to different keys many times over many years, usually to get them to fit into a range that a singer likes. In all that time no-one has ever said "Oh you've made that song sound really sad by moving it into that other key"Gps wrote:I am willing to bet, that if you try it out, you will hear it, but I think the type of instrument has a big influence too.

Tempo has a lot of effect and of course major vs minor but not (to my ears) a simple transposition. But it's probably just me because I do know plenty of people who insist that different keys sound "dark" or "happy" or "romantic". To me they just sound a bit higher or lower

But as we've said many times....you need to listen to what YOUR ears are telling you. If it sounds good to you there will be other people out there who like how it sounds too.
Steve