@sun @why

In my case, in descending order:

Linux kernel source (well actually build object code) ("ksrc")
Anime episodes ("tt")
General archive, mostly home photos ("arc"), source tarballs, scholarly publications, etc.
Photos from my phone yet unsorted and uncompressed ("k")
Git clones that I needed at one time or another ("prog")
Installation images ("sw")
One oddly large issue, 02488269 - logs downloaded from Jira for analysis
Everything 3D printing related
VM disk images and XMLs
My mp3 collection - oddly enough mostly bought at Amazon if you can believe that

I was sure that videos were by far the largest consumer of disk space, kinda surprising to see Linux up there.