>>127325647
>I know 12TET renders keys mostly arbitrary
Not really? Just because they don't have a distinct character due to all the keys being out of tune in a slightly different way doesn't mean that keys are meaningless. A piece in A minor will sound different to a piece in E minor and people can still tell the A minor version from the E minor version.
Just a quick example:
https://vocaroo.com/19FgCWqwitc4
The same melody, first in C, then in G, you'd be deaf to say that the difference is entirely arbitrary
>writing in C feels so gay every time
You shouldn't think that, though. Jupiter is in C major and that's one of the greatest symphonies ever written, so is piano concerto Elvira Madigan