Mine's a mess (thanks to experimenting/trying out/playing around with too many programs that have their own idea of where things should go) and I'm not going to show it to you.

I'll just say that I've been trying to use some shorter names for common directories. Here are the ones that are most often disrespected, so I'm making do with symlinks to my shorter-named dirs:

Documents --> doc
Pictures --> pix
Videos -> flix
Downloads --> xfr

[Edit: I'd forgotten about ~/.config/user-dirs.dirs until posting this prompted me to go back into my notes to remember how to change these directory names.]

My music library is in ~/music, with subdirs artist/album.
Audio files other than music go in ~/snd
I've thought about shorter names for the music directory. "tunes" is nice, but no shorter.
I've also thought about moving "music" under snd, along with "playlists" and a "genres" directory as a mountpoint for pytagsfs. Maybe someday.

[edit: "playlists" is now "m3u".]

Of course I also have
bin
src
etc
lib
include
man
share
tmp
var
www

[edit: I moved "share" under ~/.local ]

You guys have some good ideas, however, that I might have to steal!